JP6978382B2 - combine - Google Patents

Description

The present invention relates to a combine equipped with a threshing device for threshing a harvested grain culm and a waste straw cutting device connected to the rear portion of the threshing device to cut the waste straw after the threshing treatment.

As the waste wall cutting device in the above-mentioned combine, for example, as shown in Patent Document 1, a cutting shaft as a drive shaft, a rotary cutter as a drive blade having a plurality of cutting blades supported by the drive shaft, and a rotary cutter. A supply shaft as a cutting shaft parallel to the drive shaft, a rotary feeder as a receiving blade having a supply blade as a plurality of receiving blades supported by the cutting shaft and corresponding to the cutting blade, and a drive blade and Some are equipped with a cutter case as a case for accommodating the blade receiving body.

Japanese Unexamined Patent Publication No. 2010-99027

In the above-mentioned waste straw cutting device, it may be necessary to perform cleaning such as removing the waste straw that is clogged between the cutting blades or entangled with the drive shaft. In addition, it may be necessary to inspect the drive shaft and cutting blade. Conventionally, in such a case, the drive blade must be taken out from the case, and it is necessary to support both ends of the drive shaft in order to take out the drive blade, so that at least two workers are required. You will need it. It also takes a lot of time.

The present invention provides a combine that can quickly perform operations such as cleaning and inspection of a drive blade with a small amount of manpower.

The combine according to the present invention
A threshing device for threshing the harvested grain and a waste wall cutting device connected to the rear of the threshing device to cut the waste waste after the threshing treatment are provided, and the waste waste cutting device includes a drive shaft and a drive shaft. A drive blade having a plurality of cutting blades supported by the drive shaft, a cutting shaft parallel to the drive shaft, and a plurality of receiving blades supported by the cutting shaft and corresponding to the cutting blade. A horizontal cover provided separately from the case, the case for accommodating the drive blade and the blade, and the case, and covering a mechanism for transmitting power to the drive shaft. The case is provided with a case body having an open rear portion and a rear cover for closing the rear portion of the case body, and the rear cover has a pivot core along the vertical direction of the machine body. The sideways state is a closed state in which the drive blade is closed from the rear by the swing as a swing fulcrum to enable cutting processing by the waste wall cutting device, and an open state in which the drive blade is opened rearward. It is configured so that the state can be changed separately from the cover.

According to this configuration, if the rear cover is opened, the drive blade is opened to the rear, so that the drive blade can be cleaned and inspected from the rear without removing the drive blade from the case. .. Therefore, the work such as cleaning and inspection of the drive blade can be performed by one person or the like with less manpower than before, and can be performed quickly.

Combine according to the present invention, cutting and threshing device for threshing process the culms, is connected to a rear portion of the threshing apparatus, and discharging straw cutting device for cutting process the waste straw after threshing treatment is provided, the exhaust straw The cutting device includes a drive shaft, a drive blade body having a plurality of cutting blades supported by the drive shaft, a cutting shaft parallel to the drive shaft, and the cutting blade supported by the cutting shaft. A receiving body having a plurality of corresponding receiving blades, a case for accommodating the driving blade and the receiving blade, and a case main body having an open rear portion and a rear portion of the case main body are provided in the case. The rear cover is provided with a rear cover for closing the rear cover, and the rear cover has a closed state in which the drive blade is closed from the rear to enable cutting processing by the drainer cutting device, and the drive blade is opened rearward. It is configured to be open and state changeable , is provided in a state of being lined up with the threshing device in the width direction of the machine, and is provided with a grain tank for collecting and storing grains obtained by the threshing process, and the rear cover. Is provided with a pivot portion provided on the lateral end side portion of the rear cover on the grain tank side and having a pivot shaft core along the vertical direction of the machine body, and the rear cover swings the pivot shaft core. state changeable der in said open state and said closed state by swinging with a fulcrum is, the in pivot portion, a pivot boss formed on one of said rear cover and said case body, said case body A pivot shaft provided on the other side of the rear cover and inserted into and engaged with the pivot boss is provided, and a locking mechanism for holding the rear cover in the closed state is provided. Are provided at a plurality of upper and lower locations, and in each of the upper and lower pivot portions, one of the pivot shaft and the pivot boss engages with the other of the pivot shaft and the pivot boss from above. It is configured to be detachably engaged, and in the vertically adjacent pivots, the engagement depth of the pivot shaft with respect to the pivot boss in the lower pivot and the engagement depth in the upper pivot. The engagement depth of the pivot axis with the pivot boss is different .

According to this configuration, the rear cover is opened and closed by rocking, but it is opened to the grain tank side so that the rear cover does not protrude to the lateral outside of the machine, or even if it protrudes, it does not protrude too long. Can work on the drive blade.

According to this configuration, while the rear cover is opened and closed by rocking, the position of the rear cover can be held in the closed state by the lock mechanism, so work is done while firmly preventing the leakage of shredded straw and the backlash of the rear cover. You can do it or run it.
According to this configuration, when the rear cover is attached to the case body, the shallower pivot in the upper pivot and the lower pivot, which has a deeper engagement with the pivot of the pivot shaft. A guide function for a pivotal portion in which the pivotal shaft begins to engage with the pivotal portion prior to engaging with the pivotal portion, and the pivotal portion that has begun to engage earlier becomes engaged later. Since it is easy to align the pivot shaft and the pivot boss in the pivot that is exerted and later becomes engaged, it is easy to operate the pivot that will be engaged later in the engaged state.

In the present invention, it is preferable that a support member attached to the case body and supporting one of the pivot boss and the pivot shaft is provided.

According to this configuration, the case body can be reinforced by a simple reinforcing structure in which a support member is used as a reinforcing member for the portion of the case body where the load of the rear cover is applied by the pivot of the rear cover.

In the present invention, the first guide state for guiding the waste straw after the threshing treatment to flow into the inside of the case and the waste straw after the threshing treatment flow out to the rear outside of the case to the waste straw cutting device. A guide member that can change the state to the second guide state is provided.
The rear cover is provided with a mounting portion capable of supporting a waste straw dropper that discharges a set amount of the discharged straw that has flowed out to the rear outside of the case when the guide member is in the second guide state. It is preferable that the dropper is configured to move with the rear cover when the rear cover changes state.

According to this configuration, when the drive blade is opened rearward to work on the drive blade, the waste straw dropper moves along with the opened rear cover, so that the waste straw dropper does not become an obstacle. Easy to work with.

It is a left side view which shows the whole combine. It is a top view which shows the exhaust straw cutting apparatus in the state which the threshing apparatus, the grain tank, and the rear cover are open and the cutting blade is extended. It is a vertical sectional side view which shows the threshing apparatus. It is a power transmission path diagram. It is a perspective view which shows the exhaust straw cutting device with the rear cover removed. It is a rear view which shows the exhaust straw cutting apparatus and the exhaust straw dropper. It is a side view which shows the waste straw cutting device, the shredded straw discharge device, and the waste straw dropper. It is a side view which shows the right side wall. FIG. 8 is a cross-sectional view taken along the line IX-IX of FIG. It is a top view which shows the support structure of the left end part of a drive shaft in the state which a part of the left side wall is broken. It is a top view which shows the rocking state of the left end part of a drive shaft. It is a side view which shows the support structure of the left end part of a drive shaft. It is a top view which shows the support structure of the left end part of a drive shaft. It is explanatory drawing of the connection process of the connection structure.

Hereinafter, embodiments that are an example of the present invention will be described with reference to the drawings.
In the following description, regarding the combine aircraft, the direction of arrow F shown in FIG. 1 is "front of the aircraft", the direction of arrow B is "rear of the aircraft", the direction of arrow U is "upward of the aircraft", and arrow D. The direction is "downward of the aircraft", the direction of the front side of the paper is "left side of the aircraft", and the direction of the back side of the paper is "right side of the aircraft".

[About the overall composition of the combine]
As shown in FIG. 1, the combine includes an airframe frame 1 and an airframe having a pair of left and right crawler traveling devices 2 movably equipped under the airframe frame 1. The driving unit 3 is formed in the right region of the front portion of the airframe. The driver unit 3 is provided with a cabin 4 that covers the boarding space. A driving part having an engine 5 is formed below the driving part 3. A pre-cutting processing unit 6 for cutting and transporting grain culms such as paddy rice and wheat located in front of the machine during work running is connected to the left region in the front part of the machine frame 1. The pre-cutting processing unit 6 is connected in a state where it can move up and down with the pivot core P1 facing left and right of the machine as a fulcrum. The up-and-down swing of the pre-cutting unit 6 is performed by the expansion and contraction operation of the hydraulic elevating cylinder 8 erected over the machine frame 1 and the pre-processing unit frame 7. A threshing device 9 that receives a cut grain culm carried by the pre-cutting processing unit 6 in a portion of the machine frame 1 on the rear side of the pre-cutting processing unit 6 and threshs the processed material after the threshing treatment. Is provided. A waste straw cutting device 10 for cutting the waste straw after the threshing process is connected to the rear part of the threshing device 9. A waste straw dropper 11 is provided on the rear side of the waste straw cutting device 10 to discharge the waste straw after the threshing process in a long straw state. Below the waste straw cutting device 10, there is provided a shredded straw discharging device 12 that diffuses the shredded straw discharged from the waste straw cutting device 10 in the lateral width direction of the machine body by the diffusion auger 12a and discharges the shredded straw to the field. A grain tank 13 for collecting and storing single grain grains conveyed from the threshing device 9 is provided in a portion of the machine frame 1 on the rear side of the operating unit 3. As shown in FIG. 2, the threshing device 9 and the grain tank 13 are provided on the machine frame 1 in a state of being arranged in the horizontal direction of the machine, that is, in a so-called side-by-side state. A grain discharging device 14 for discharging the stored grains is connected to the rear portion of the grain tank 13.

[About the configuration of the pre-cutting processing unit]
In the pre-harvesting processing unit 6, as the machine travels, the culm to be harvested among the planted culms is introduced into the raising device 6b by the divider 6a to be caused and processed, and the planted culm is caused and processed. The root of the stock is cut by a hair clipper type cutting device 6c, and the culm to be harvested is cut. The cut grain culm is supplied to the starting end of the threshing feed chain 15 (see FIG. 2) of the threshing device 9 by the transport device 6d arranged behind the cutting device 6c.

[About the configuration of the threshing device]
In the explanation of the threshing device 9, the processing start end side of the threshing device 9 [grain culm input side (left side of the paper in FIG. 3)] is defined as "front", and the processing end side of the threshing device 9 [waste straw discharge side (paper in FIG. 3)]. Right side)] is "after".

As shown in FIG. 3, the threshing apparatus 9 includes a threshing unit 9A for performing a threshing process on the harvested grain culm, a sorting unit 9B for performing a sorting process on the processed product after the threshing process, and a processed product to be collected after the sorting process. The collection unit 9C for collecting the straw is provided, and the waste straw transport device 16 for transporting the threshing waste straw toward the waste straw cutting device 10. In this threshing device 9, the threshing processing direction in the threshing unit 9A and the sorting processing direction in the sorting unit 9B coincide with the front-rear direction of the machine, and the upper side in the threshing processing direction and the upper side in the sorting processing direction are located on the front side of the machine. It is set to.

In the threshing unit 9A, as shown in FIG. 3, the stock source side of the harvested culm supplied by the transport device 6d (see FIG. 1) of the pre-cutting unit 6 is sandwiched by the threshing feed chain 15 and the threshing device 9 is used. Is transported backwards. The tip side of the harvested culm carried by the threshing feed chain 15 is inserted into the handling chamber 17 and threshed by the handling cylinder 18 and the receiving net 19. The threshed product such as grains obtained by the threshing treatment leaks from the receiving net 19 to the sorting unit 9B. The discharged straw after the threshing process is discharged from the dust outlet 20 at the rear of the handling chamber to the rear side of the handling chamber 17 by the threshing feed chain 15. The discharged straw is unraveled and processed by the separation drum 21. The single grain grains obtained by the unraveling treatment flow down to the sorting unit 9B. After being unraveled, the waste straw is delivered from the threshing feed chain 15 to the waste straw transport device 16, and is discharged to the rear outside of the threshing device 9 by the waste straw transport device 16.

In the sorting unit 9B, as shown in FIG. 3, the threshing processed product such as grains and dust leaked from the receiving net 19, and the grains flowing down from the separation drum 21 are received by the rocking sorting device 22. Be done. The received threshing processed product is subjected to sieve sorting by the swing sorting device 22 and wind sorting by the sorting wind supplied by each of the wall insert 23, the first secondary wall insert 24, and the second wall insert 25. Is sorted out. The selected grains flow down to the collection unit 9C, the selected dust is sucked into the dust exhaust fan 26 together with the sorting wind, and the inside of the exhaust straw cutting device 10 and the shredded straw discharge device 12 are sucked from the dust exhaust fan 26. It is discharged to the rear of the threshing device 9 through the inside of the grain.

In the collection unit C, the single-grained grain as the first grain among the grains flowing down from the rocking sorting device 22 is collected by the No. 1 screw conveyor 27 and connected to the transport end portion of the No. 1 screw conveyor 27. It is transported to the fried grain device 28. The grain frying device 28 conveys the single grain grains inherited from the first screw conveyor 27 to the grain tank 13. The untreated grains as the second grain among the grains flowing down from the rocking sorting device 22 are collected by the No. 2 screw conveyor 29 and conveyed to the reduction device 30 connected to the transfer end portion of the No. 2 screw conveyor 29. Ru. The reduction device 30 reduces the untreated grains inherited from the second screw conveyor 29 to the rocking sorting device 22.

[About the configuration of the waste straw cutting device]
As shown in FIGS. 2 and 3, the waste straw cutting device 10 includes a case 31 provided at the rear of the threshing device 9. An exhaust straw inlet 32 and a guide member 33 for guiding the exhaust straw falling from the transfer end portion of the exhaust straw transfer device 16 are provided on the upper part of the case 31. As shown in FIGS. 2 and 5, the driving blade 34 and the receiving blade 35 are housed inside the case 31.

As shown in FIG. 3, the guide member 33 is supported by the case 31 so as to be vertically swingable on the rear side of the exhaust straw inlet 32, and has a lid function for opening and closing the exhaust straw inlet 32. When the posture of the guide member 33 is changed to a posture in which the guide member 33 stands up with respect to the upper surface portion of the case 31, the guide member 33 is in the first guide state in which the waste straw inlet 32 is opened, and the guide member 33 guides the waste straw that falls from the waste straw transfer device 16. Guided to flow into the inside of the case 31 from the exhaust straw inlet 32 by the back side surface of the case. When the posture of the guide member 33 is changed to a posture along the upper surface portion of the case 31, the guide member 33 is in the second guide state in which the exhaust straw inlet 32 is closed, and the exhaust straw falling from the exhaust straw transfer device 16 is brought to the front of the guide member 33. The side surface guides the case 31 to flow out to the rear outside in a long straw state.

As shown in FIGS. 5, 6 and 12, the case 31 is provided with a case main body 31A having a guide member 33 and a rear cover 31B constituting the rear part of the case main body 31A.
The rear cover 31B is provided over the left side wall 31L and the right side wall 31R of the case body 31A. The rear end side portion of the left side wall 31L and the rear end side portion of the right side wall 31R are connected by a frame 31C extending in the lateral width direction of the waste straw cutting device 10.

As shown in FIG. 5, the drive blade 34 includes a drive shaft 34a rotatably supported by the left side wall 31L and the right side wall 31R, and a plurality of cutting blades 34b rotatably supported by the drive shaft 34a. have. The plurality of cutting blades 34b are arranged at intervals in the axis direction of the drive shaft 34a. The drive blade 34 is rotationally driven in the rotational direction indicated by the arrow X (see FIG. 3) by the power transmitted from the threshing device 9.

The blade receiving body 35 is rotatably supported by the left side wall 31L and the right side wall 31R in a state of being positioned parallel to the drive shaft 34a in front of the drive shaft 34a, and cannot rotate relative to the cutting shaft 35a. It has a plurality of receiving blades 35b corresponding to the cutting blade 34b while being supported by the cutting blade 34b.
The blade 35 is rotationally driven in the rotational direction indicated by the arrow Y (see FIG. 3) by the power transmitted from the threshing device 9. As shown in FIGS. 5, 9 and 10, scrapers 96 for preventing straw waste from wrapping around the drive shaft 34a and the cutting shaft 35a are provided at both ends of the drive shaft 34a and the cutting shaft 35a so as to be non-relatively rotatable. ing.

In the exhaust straw cutting device 10, when the guide member 33 is switched to the first guide state, the exhaust straw that has fallen from the exhaust straw transport device 16 flows into the inside of the case 31 from the exhaust straw input port 32. The inflowing waste wall is placed on the driving blade 34 and the receiving blade 35, and is scraped between the driving shaft 34a and the cutting shaft 35a by the cutting blade 34b and the receiving blade 35b, while being scraped by the cutting blade 34b and the receiving blade 35b. It is cut and shredded to cut the waste wall at multiple points in the blade direction. The shredded straw falls into the diffusion discharge case of the shredded straw discharge device 12 connected to the lower part of the case 31.

The rear cover 31B is configured to be able to change the state between a closed state in which the drive blade 34 is closed from the rear and the cutting process by the waste straw cutting device 10 is possible, and an open state in which the drive blade 34 is opened rearward. ing. Specifically, it is configured as follows.

As shown in FIG. 5, the case body 31A is provided with an opening 36 formed at the rear portion of the case body 31A. The opening 36 is formed over the left side wall 31L and the right side wall 31R of the case body 31A. As shown in FIG. 6, the lateral end side portion of the rear cover 31B on the grain tank side and the right side wall 31R have a pivot core P2 facing vertically on the machine body, and a connecting structure 37 that can be disconnected is provided. It is connected via. The rear cover 31B is supported by the case main body 31A in a state in which the pivot shaft core P2 is used as a swinging fulcrum and can be swinged and detached.

By swinging the rear cover 31B toward the grain tank side as shown in FIG. 2, or by removing the rear cover 31B from the case body 31A as shown in FIG. 5, the rear cover 31B opens the opening 36. It opens and the drive blade 34 is opened to the rear.
By attaching the rear cover 31B to the case body 31A as shown in FIG. 12 and along the left side wall 31L and the right side wall 31R, the rear cover 31B closes the opening 36 and closes the drive blade 34 from the rear. Become.

As shown in FIGS. 5 and 6, a fixed handle 38 for swinging the rear cover 31B is provided at the free end portion of the rear cover 31B. When the portion cover 31B is in the closed state, as shown in FIGS. By mounting over the left side wall 31L, the rear cover 31B can be held in the closed state. In the present embodiment, the lock bolt 39 is adopted as the lock mechanism, but the lock bolt 39 is not limited to this. For example, various lock members such as shrimp metal fittings, those using bands and hooks, and handle locks using catchers can be adopted. Further, the lock pin provided on the rear cover 31B, the hook provided on the case body side in a state where the lock pin can be engaged with and detached, the lock spring for urging the hook to the engaging side, and the hook against the lock spring. A hook type mechanism having a handle for removing and operating may be adopted.

As shown in FIGS. 5 and 12, a rounded portion 31D is provided at the upper corner portion of the left side wall 31L. A rounded portion 31E is provided at a portion of the free end portion of the rear cover 31B that overlaps the rounded portion 31D on the wall side when the rear cover 31B is closed. In the rear cover 31B, when the rear cover 31B is opened and the rounded portion 31E on the cover side is in a free state, the radius of the rounded portion 31E on the cover side becomes smaller than the radius of the rounded portion 31D on the wall side. It is configured in. When the rear cover 31B is closed and tightened to the left wall 31L by the lock bolt 39, the rounded portion 31E on the cover side is elastically deformed along the rounded portion 31D on the wall side, and the rear cover 31B is elastically restored. The lock bolt 39 is prevented from loosening by the elastic restoring force of the rear cover 31B.

[Structure of connecting structure of rear cover]
As shown in FIGS. 6 and 8, the connecting structure 37 is provided with a pivot portion 40 provided at two positions above and below the rear cover 31B and having a pivot shaft core P2. Each of the upper pivot portion 40 and the lower pivot portion 40 is provided with a pivot boss 40a supported by the right side wall 31R and a pivot shaft 40b supported by the rear cover 31B.

In the upper and lower pivot parts 40, the pivot shaft 40b is pierced into the pivot boss 40a from above, so that the pivot shaft 40b and the pivot boss 40a are engaged with each other so as to be relatively rotatable, and the rear cover 31B is the case. It is swingably supported by the main body 31A. By pulling out the pivot shaft 40b upward from the pivot boss 40a, the engagement between the pivot shaft 40b and the pivot boss 40a can be released, and the rear cover 41B can be removed from the case body 31A.

In each of the upper pivot portion 40 and the lower pivot portion 40, the pivot boss 40a is supported by a support member 41 attached to the right side wall 31R, as shown in FIGS. 8 and 14.
The pivot boss 40a is supported by the right side wall 31R via the support member 41. The portion that pivotally supports the rear cover 31B of the right side wall 31R is reinforced by the support member 41. The upper support member 41 and the lower support member 41 are the same support member. The pivot boss 40a and the support member 41 are connected by welding. The support member 41 and the right side wall 31R are connected by a connecting bolt. As shown in FIG. 8, the upper portion of the support member 41 is bolted to the mounting portion 42 of the right side wall 31R.

As shown in FIG. 8, the engagement depth of the pivot shaft 40b with the pivot boss 40a in the upper pivot portion 40 is larger than the engagement depth of the pivot shaft 40b with the pivot boss 40a in the lower pivot portion 40. Is also set deeply. When the rear cover 31B is supported by the case body 31A, that is, when the connecting structure 37 is in the connected state, the pivot shaft 40b in the lower pivot portion 40 engages with the pivot boss 40a as shown in FIG. By the guide function that the pivot shaft 40b in the upper pivot 40 engages with the pivot boss 40a and the pivot shaft 40b and the pivot boss 40a in the upper pivot 40 engage with each other. It is easy to align the pivot shaft 40b and the pivot boss 40a in the lower pivot portion 40, and it is easy to operate the lower pivot portion 40 in an engaged state.

In the present embodiment, the pivotal support portions 40 are provided at two upper and lower locations, but the present invention is not limited to this, and may be provided at three or more locations. Further, contrary to the connection structure 37 of the present embodiment, the engagement depth of the pivot shaft 40b with the pivot boss 40a in the lower pivot portion 40 is the pivot boss of the pivot shaft 40b in the upper pivot portion 40. It may be set deeper than the engagement depth with respect to 40a so that the pivot shaft 40b starts to engage with the pivot boss 40a at the lower pivot 40 before the upper pivot 40. In the present embodiment, the pivot shaft 40b is configured to be inserted into the pivot boss 40a from above, but the pivot boss 40a may be configured to be inserted into the pivot shaft 40b from above. ..

[About the support structure of the drive blade]
The drive blade 34 is in a used state in which both ends of the drive shaft 34a are supported by the left side wall 31L and the right side wall 31R of the case 31, and the left end portion as one end of the drive shaft 34a is supported by the left side wall 31L. The right end portion as the other end portion of the drive shaft 34a is configured to be in an overhanging state protruding to the outside of the case 31 so that the state can be changed. Specifically, it is configured as follows.

As shown in FIG. 9, the right bearing case 43 is mounted on the right end of the drive shaft 34a. The right side bearing case 43 is housed in the right side bearing case 43 and rotatably supports the drive shaft 34a via a bearing (not shown) mounted on the drive shaft 34a. A locking portion 43a is provided on the lateral side of the right bearing case 43. As shown in FIG. 8, a mounting hole 44 is provided in the right side wall 31R. As shown in FIGS. 8 and 9, the right bearing case 43 is engaged with the mounting hole 44 by the locking portion 43a, and the right bearing case 43 is fixed to the right wall 31R by a plurality of connecting bolts 45. Therefore, the right end portion of the drive shaft 34a is rotatably supported by the right side wall 31R. As a result, the drive blade 34 is rotatably supported by the right side wall 31R. By disconnecting the right end of the right bearing case 43 from the right wall 31R by the connecting bolt 45, the support of the right end of the drive shaft 34a to the right wall 31R can be released, and the right end of the drive shaft 34a can be attached to the mounting hole together with the right bearing case 43. It can be taken in and out of the case body 31A by being guided by the guide groove 46 communicating with the 44.

As shown in FIGS. 8 and 9, a through hole 47 that allows the drive shaft 34a to be removed is opened in the lower portion of the mounting hole 44 in the right side wall 31R. The through hole 47 communicates with the mounting hole 44. A cover 48 covering the through hole 47 is detachably supported on the outer surface side of the right side wall 31R so that the shredded straw does not leak from the through hole 47. A recessed portion 49 is formed on the inner surface side of the right side wall 31R so that the drive shaft 34a can be removed. The recess 49 is formed over the through hole 47 and the front end of the right side wall 31R.

As shown in FIG. 10, the left bearing case 50 is mounted on the left end of the drive shaft 34a. The left bearing case 50 is housed in the left bearing case 50 and rotatably supports the drive shaft 34a via a bearing (not shown) mounted on the drive shaft 34a. A plate-shaped connecting portion 51 is provided on the lateral side of the left bearing case 50. The connecting portion 51 is detachably connected to the left bearing case 50 by a plurality of connecting bolts 52 (see FIGS. 10 and 12). As shown in FIGS. 10 and 12, the left side bearing case 50 is fixed to the left side wall 31L by detachably connecting the connecting portion 51 to the outer surface side of the left side wall 31L by the connecting bolt 53, and the drive shaft 34a. The left end portion is rotatably supported by the left side wall 31L, and the left end portion of the drive blade 34 is rotatably supported by the left side wall 31L. As shown in FIG. 10, when the drive shaft 34a is supported by the left side wall 31L, the flange portion 50a connected to the connecting portion 51 of the left side bearing case 50 is provided in the left side wall 31L through a hole 54. It's getting in. As shown in FIG. 11, by releasing the connection of the connecting portion 51 to the left side wall 31L by the connecting bolt 53, the fixing of the left side bearing case 50 to the left side wall 31L is released, and the drive shaft 34a can be swung. become.

As shown in FIGS. 12 and 13, a swing mechanism 55 for supporting the left end portion of the drive shaft 34a is provided on the lateral outer side of the left side wall 31L. The swing mechanism 55 includes a body vertically oriented support shaft 56 rotatably supported by the left wall 31L, and a swing support 55a connected to the support shaft 56 and the left end of the drive shaft 34a. There is. The support shaft 56 and the swing support 55a are connected by welding. The swing support 55a and the connecting portion 51 are connected, and the swing support 55a is connected to the left end portion of the drive shaft 34a via the connecting portion 51 and the left bearing case 50. The rocking support 55a and the connecting portion 51 are connected by welding. The left end of the drive shaft 34a is supported by the swing mechanism 55 in a state where the left end of the drive shaft 34a can swing with the vertical axis P3 of the support shaft 56 as a swing fulcrum. ing. The left end portion of the drive shaft 34a is supported by the left side wall 31L via the swing mechanism 55. The connection of the connecting portion 51 to the left side wall 31L by the connecting bolt 53 is released, and the connection of the right side bearing case 43 to the right side wall 31R by the connecting bolt 45 is released, and the drive shaft 34a is supported by the right end wall 31R. As shown in FIG. 11, the shaft of the support shaft 56 remains supported by the left side wall 31L via the swing support 55a and the support shaft 56, while the left end portion of the drive shaft 34a is released. The drive shaft 34a can be swung with respect to the case 31 with the core P3 as the swing fulcrum. When the drive shaft 34a swings, as shown in FIGS. 10 and 11, the front end side portion of the connecting portion 51 passes through the through hole 54 and moves to the outside and the inside of the left side wall 31L, and is rear of the connecting portion 51. The end side portion may be along the left side wall 31L or may be separated from the left side wall 31L to the outside. That is, in the drive blade 34, the left end portion of the drive shaft 34a is supported by the left side wall 31L via the left bearing case 50, and the right end portion of the drive shaft 34a is supported by the right side wall 31R via the right side bearing case 43. In use, the left end of the drive shaft 34a is supported by the left wall 31L via the left bearing case 50 and the swing mechanism 55 (swing support 55a and support shaft 56), while the right end of the drive shaft 34a is the case. It can be changed to the overhanging state of 31 protruding to the outside.

In the present embodiment, a swing mechanism 55 that supports the left end of the drive shaft 34a in a state where the left end of the drive shaft 34a swings with the vertically oriented shaft core P3 as a swing fulcrum is adopted. However, the swing mechanism may be adopted in which the left end portion of the drive shaft 334a swings with the shaft core slightly inclined with respect to the vertically oriented shaft core as a swing fulcrum.

As shown in FIG. 12, the support shaft 56 is supported by a shaft support member 57 supported by the left side wall 31L to rotatably support the upper end side portion of the support shaft 56, and a support shaft 56 supported by the left side wall 31L. It is rotatably supported by the left side wall 31L via a shaft support member 58 that rotatably supports the lower end side portion of the. The upper shaft support member 57 is supported by the left side wall 31L via a connecting portion 60a described later. The upper shaft support member 57 and the lower shaft support member 58 are externally fitted to the support shaft 56 so as to be relatively rotatable. The outer diameter of the part of the support shaft 56 that fits inside the upper shaft support member 57 is D1, and the outer diameter of the part of the support shaft 56 that fits inside the lower shaft support member 58 is D2. Assuming that the outer diameter of the portion of the shaft 56 located between the upper shaft support member 57 and the lower shaft support member 58 is D3, the outer diameter D3 is set to be larger than the outer diameter D1 and the outer diameter is set to be larger than the outer diameter D1. The diameter D3 is set to be larger than the outer diameter D2. The support shaft 56 is supported by the upper and lower shaft support members 57, 58 in a state where the upward displacement is prevented by the upper shaft support member 57 and the downward displacement is prevented by the lower shaft support member 58. Has been done.

[About the horizontal holding mechanism]
As shown in FIGS. 12 and 13, a horizontal holding mechanism 59 for holding the horizontal posture of the drive shaft 34a when the drive blade 34 changes its state is provided on the lateral outer side of the left side wall 31L. The horizontal holding mechanism 59 includes a swing support 55a as a drive shaft side member and a case side member 60 supported by the left side wall 31L. The case-side member 60 has a connecting portion 60a connected to the inner end portion of the case-side member 60, and is connected to the left side wall 31L by the connecting portion 60a. The swing support 55a is connected to the left end of the drive shaft 34a via the left bearing case 50, and becomes a drive shaft side member that swings together with the drive shaft 34a. The case side member 60 is fixed to the left side wall 31L in a state of being overlapped on the swing support 55a.

In the horizontal holding mechanism 59, when the drive blade 34 changes its state, the swing support 55a swings together with the drive shaft 34a, and the upper surface of the swing support 55a and the lower surface of the case side member 60 face each other. The rocking support 55a moves with respect to the case-side member 60 while being in sliding contact with each other. Although the swing support 55a is located below the case side member 60, the free end portion (right end portion) of the drive shaft 34a with respect to the swing fulcrum (axis core P3 of the support shaft 56) of the drive shaft 34a. The upper surface of the swing support 55a and the lower surface of the case side member 60 are in sliding contact with each other at a position opposite to the side where the is located. Even if the drive shaft 34a tries to tilt, that is, even if the swing support 55a tries to tilt, the swing support 55a is supported from above by the case side member 60 to prevent the swing support 55a from tilting and drive. Horizontal holding is performed to hold the horizontal posture of the shaft 34a.

[Regulatory mechanism]
As shown in FIGS. 12 and 13, a regulation mechanism 61 for restricting the swing of the drive shaft 34a when the drive blade 34 changes to the overhanging state is provided on the lateral outer side of the left side wall 31L. The regulation mechanism 61 is provided with a swing support 55a and a case-side member 60. The case-side member 60 is formed with an elongated hole 62 for setting the swing range of the drive shaft 34a. A regulation pin 63 that is movable into the slotted hole 62 is provided on the swing support 55a.

As shown in FIGS. 7 and 10, an endless rotating chain 64 is wound around the drive shaft 34a on the lateral outer side of the left side wall 31L. The endless rotating chain 64 is wound around an output sprocket 90 and a relay sprocket 91 provided on the drive shaft 34a so as not to rotate relative to each other. The relay sprocket 91 is interlocked with the blade receiving body drive gear 93 via the relay gear 92.
The power of the drive shaft 34a is transmitted to the blade receiving body 35 via the endless rotating chain 64, the relay sprocket 91, and the relay gear 92. When the drive blade 34 changes to the overhanging state, the endless rotating chain 64 is twisted by the swing of the drive shaft 34a.

In the regulation mechanism 61, when the drive blade 34 changes to the overhanging state, the swing support 55a swings together with the drive shaft 34a, and the regulation pin 63 moves inside the slot 62. When the twist of the endless rotating chain 64 reaches the limit or near the limit of the allowable range, the regulation pin 63 reaches the end of the slot 62, and further swing of the swing support 55a is blocked by the case side member 60. To. That is, swing regulation is performed to prevent the drive shaft 34a from swinging beyond the swing angle range corresponding to the allowable range of twisting of the endless rotating chain 64. In the present embodiment, a swing angle range of about 15 degrees is set as a swing angle range in which the drive shaft 34a can be swung from the state of use. In the present embodiment, the elongated hole 62 is provided in the case side member 60 and the regulation pin 63 is provided in the swing support 55a, but the elongated hole 62 is provided in the swing support 55a and the regulation pin 63 is provided in the case. The configuration provided on the side member 60 may be adopted and carried out.

[About the guide mechanism]
As shown in FIGS. 12 and 13, a guide mechanism 65 for guiding the swing of the drive shaft 34a when the drive blade 34 changes its state is provided on the lateral outer side of the left side wall 31L. The guide mechanism 65 is composed of a swing support 55a and a case side member 60.

In the guide mechanism 65, when the drive blade 34 changes its state, the swing support 55a swings together with the drive shaft 34a, and the upper surface of the swing support 55a and the lower surface of the case side member 60 are in sliding contact with each other. The swing support 55a moves with respect to the case-side member 60, and the swing support 55a swings while being guided by a guide surface formed on the lower surface of the case-side member 60. That is, the swing guidance of the drive shaft 34a is performed so that the drive shaft 34a swings while being guided by the case side member 60.

The horizontal holding mechanism 59, the regulating mechanism 61, and the guide mechanism 65 are composed of a swing support 55a and a case-side member 60 shared by the horizontal holding mechanism 59, the regulating mechanism 61, and the guide mechanism 65.

[About the configuration of the exhaust straw dropper]
As shown in FIG. 7, the draining straw dropper 11 is provided on the rear side of the draining straw cutting device 10, and when the guide member 33 is switched to the second guiding state, it flows out to the rear side of the draining straw cutting device 10. It is configured to discharge the discharged straw to the field in a set amount in a long straw state.

Specifically, as shown in FIGS. 6 and 7, the exhaust straw dropper 11 drops the exhaust straw so that the exhaust straw discharged to the rear side of the case 31 of the exhaust straw cutting device 10 intermittently drops by a set amount. A pair of left and right drop control rods 66, a waste straw dropper body 68 that receives the waste straw that has fallen from the fall control rod 66 and drops it into the field in increments of a set amount, and a waste straw dropper body that removes the waste straw that has fallen from the fall control rod 66. It is provided with a guide plate 69 that guides the user to fall to 68, and a pair of left and right guide rods 70 that form a path for dropping the exhaust straw from the drop control rod 66 to the exhaust straw dropper main body 68. The draining straw dropper main body 68 receives and stays the draining straw that has fallen from the drop control rod 66, and when the weight of the accumulated draining straw exceeds the weight set by the dropper spring 67, it descends and swings due to the weight of the draining straw and stays there. Drop the waste straw that had been used in the field.

As shown in FIG. 6, the upper end side of the pair of left and right drop control rods 66 is supported by a support frame 71 provided above the waste straw cutting device 10 via a rotation support shaft 72 in the width direction of the machine body. .. The pair of left and right drop control rods 66 are intermittently swung in the front-rear direction with the rotary support shaft 72 as a swing fulcrum by the power of an electric motor (not shown) to open and close the upper part of the waste wall fall path. The pair of left and right guide rods 70 are supported by the support frame 71 via the support bars 73 in the lateral width direction of the machine body. The guide plate 69 and the exhaust straw dropper main body 68 are supported by the rear cover 31B of the exhaust straw cutting device 10. Specifically, as shown in FIG. 6, both lateral ends of the rear cover 31B are provided with a guide plate 69 and a mounting portion 74 capable of supporting the exhaust straw dropper main body 68. The left end of the guide plate 69, the left end of the rotary support shaft 68a of the exhaust straw dropper body 68, and the upper end of the left support frame 75 that supports each of the dropper spring 67 are the left mounting portions of the rear cover 31B. It is connected to 74. The upper end side portion of the right support frame 75 that supports each of the right end portion of the guide plate 69 and the right end portion of the rotary support shaft 68a of the exhaust straw dropper main body 68 is connected to the right mounting portion 74 of the rear cover 31B. Has been done.
As shown in FIGS. It has become like. The exhaust straw dropper main body 68 and the guide plate 69 of the exhaust straw dropper 11 are supported by the rear cover 31B in a state of moving together with the rear cover 31B when the rear cover 31B changes its state.

[About driving the threshing device and the waste straw cutting device]
As shown in FIG. 4, the power of the engine 5 is transmitted to the threshing device 9, and is transmitted from the threshing device 9 to the waste straw cutting device 10. More specifically, the power of the output shaft of the engine 5 is transmitted to the input case 77 of the threshing device 9 via the belt transmission mechanism 76. The power input to the input case 77 is transmitted to the handling cylinder 18 and the waste straw transfer device 16 via the belt transmission mechanism 78. The power input to the input case 77 is supplied by the belt transmission mechanism 79 to the first auxiliary wall insert 24, wall insert 23, first screw conveyor 27, second secondary wall insert 25, second screw conveyor 29, rocking sorting device 22, separation drum 21. , It is transmitted to each of the dust removal fan 26 and the threshing feed chain 15. The input shaft 26a of the dust exhaust fan 26 is interlocked with the input pulley 94 of the drive shaft 34a by an endless rotating belt 80. The power of the input shaft 26a of the dust exhaust fan 26 is transmitted to the drive blade 34. The power of the drive blade 34 is transmitted to the blade 35 via the output sprocket 90, the endless rotating chain 64, the relay sprocket 91, the relay gear 92, and the blade drive gear 93.

As shown in FIG. 13, a detection unit 81 for detecting the open / closed state of the rear cover 31B is provided on the lateral outer side of the left side wall 31L. The detection unit 81 is supported by a support member 87 extending from the left side wall 31L. The detection unit 81 is configured to stop driving the threshing device 9 when it detects that the rear cover 31B is not in the closed state.

Specifically, when the rear cover 31B is changed to the closed state, the detection target portion 82 provided on the free end side portion of the rear cover 31B penetrates the lateral cover 83 covering the endless rotating chain 64 and the like. It enters the inside of the horizontal cover 83 through the hole and approaches the detection unit 81. The detection unit 81 is switched to the on state when the detection target unit 82 approaches the detection unit 81 to a set distance, and is switched to the off state when the detection target unit 82 is separated from the detection unit 81 by a set distance. The detection unit 81 detects that the rear cover 31B is in the closed state by switching to the on state, and detects that the rear cover 31B is not in the closed state by switching to the off state.

As shown in FIG. 12, the detection unit 81 and the control device 84 are linked, and the control device 84 and the engine stop device 85 are linked. The control device 84 is provided with an engine stop control unit 86. When the detection unit 81 detects that the rear cover 31B is not in the closed state, the engine stop control unit 86 outputs a signal to stop the engine 5 to the engine stop device 85 based on the detection information from the detection unit 81. Then, the engine stop device 85 is controlled to operate.

When removing the clogging of the drive blade 34 or inspecting the drive blade 34, each of the pair of left and right drop control rods 66 of the exhaust wall dropper 11 is shown by a two-dot chain line in FIG. In addition, the connecting shaft between the drop control rod 66 and the rotary support shaft 72 is used as a swing fulcrum to make an ascending and swinging retracted posture, and each of the pair of left and right guide rods 70 of the drain wall dropper 11 is connected to the two-dot chain line in FIG. As shown in the above section, the connecting shaft between the guide rod 70 and the support bar 73 is used as a swinging fulcrum to provide an ascending and swinging retracted posture, and a space for opening the rear cover 31B is secured on the rear side of the case 31. When the space can be secured, the position holding of the rear cover 31B in the closed state by the lock bolt 39 is released, and the rear cover 31B is changed to the open state. That is, the rear cover 31B is opened so as to swing toward the grain tank side as shown in FIG. 2, or the upper and lower pivot shafts 40b in the connecting structure 37 are removed from the pivot boss 40a to remove the rear cover 31B. It is opened by removing it from the case body 31A. The rear cover 31B can be opened even with the entire shredded straw discharging device 12 attached. Even if the rear cover 31B is opened while the threshing device 9 is being driven, the detection unit 81 detects that the rear cover 31B is not in the closed state, the engine 5 is stopped, and the driving of the threshing device 9 is stopped. And the drive of the waste straw cutting device 10 is stopped. When the rear cover 31B is opened, the drive blade 34 is opened rearward, and the drive blade 34 can be cleaned or inspected from the rear through the opening 36 without removing the drive blade 34 from the case 31. You can do it. When the rear cover 31B is opened, the guide plate 69 and the exhaust straw dropper main body 68 of the exhaust straw dropper 11 move together with the rear cover 31B so that the guide plate 69 and the exhaust straw dropper main body 68 do not become obstacles. Work on the drive blade 34 can be performed. By opening the rear cover 31B, dust adhering to the frame 31C can be easily cleaned.

When replacing the cutting blade 34b of the drive blade 34, the rear cover 31B is opened and the opening 36 is opened in the same manner as in the case of cleaning or inspecting the drive blade 34. The connection of the right bearing case 43 to the right side wall 31R by the connecting bolt 45 is released, the connection of the connecting portion 51 to the left side wall 31L by the connecting bolt 53 is released, and the connection of the left side bearing case 50 to the left side wall 31L is released. When the right end bearing case 43 and the left side bearing case 50 can be disconnected, the right end portion of the drive shaft 34a is pulled out from the right side wall 31R together with the right side bearing case 43. Then, the swing support 55a swings, and the drive shaft 34a is supported by the left wall 31L via the swing support 55a and the support shaft 56 while the left end portion of the drive shaft 34a swings. The drive blade 34 is brought into an overhanging state by swinging with the shaft core P3 as a swing fulcrum. At this time, the drive shaft 34a swings while being held in the horizontal posture by the horizontal holding mechanism 59, and the drive shaft 34a swings while receiving the movement guidance by the guide mechanism 65, so that the drive shaft 34a can be smoothly and comfortably moved. Can be swung. Further, even if the drive shaft 34a is swung while the endless rotating chain 64 is wound around the drive shaft 34a, the drive shaft 34a is swung too much and the twist of the endless rotating chain 64 does not exceed the allowable range. As described above, the swing of the drive shaft 34a is regulated by the regulation mechanism 61, so that the endless rotating chain 64 is not damaged. Further, even if the drive shaft 34a is swung without removing the endless rotation belt 80, the regulation mechanism 61 prevents the endless rotation belt 80 from being twisted too much. When the drive blade 34 is in the overhanging state, the right end of the drive shaft 34a protrudes from the opening 36 to the outside of the rear side of the case 31, so that the outside of the case 31 is not required to remove the drive blade 34 from the case 31. In, the cutting blade 34b to be replaced can be removed from the right end of the drive shaft 34a, and a new cutting blade 34b to be attached can be attached to the drive shaft 34a from the right end.

When the drive blade 34 is removed from the case 31, the connecting portion 51 is removed from the left bearing case 50 so that the drive shaft 34a can be removed from the left wall 31L, and the connection of the right bearing case 43 to the right wall 31R is released. , The drive shaft 34a can be removed from the right side wall 31R. When the drive shaft 34a can be removed, the cover 48 is removed to open the through hole 47. When the through hole 47 can be opened, the right end portion of the drive shaft 34a is lowered from the mounting hole 44 to the recessed portion 49 through the through hole 47. Then, the drive shaft 34a is in a downward-sloping posture, and a gap is formed between the drive shaft 34a and the bottom portion of the recessed portion 49. When a gap is created, the drive shaft 34a is moved toward the right wall side and the drive shaft 34a is moved so that the right end portion of the drive shaft 34a passes through the recessed portion 49 and goes out of the case 31. 34 can be removed from the case 31.

[Another Embodiment]
(1) In the above-described embodiment, an example is shown in which the drive blade 34 is supported so that the state can be changed between the use state and the overhang state. However, the drive blade 34 is changed between the use state and the overhang state. It may be carried out without providing the configuration to be used.

(2) In the above-described embodiment, the rear cover 31B is opened and closed by swinging and detaching, but a configuration may be adopted in which the rear cover 31B is opened and closed only by swinging and detaching. .. Further, although the example in which the rear cover 31B is swingably supported on the grain tank side is shown, the rear cover 31B is swingably supported on the side opposite to the grain tank side. It may be carried out. Further, a configuration in which the rear cover 31B opens and closes by sliding may be adopted.

(3) In the above-described embodiment, an example in which the pivotal support portions 40 are provided at two upper and lower locations is shown, but the pivotal support portions 40 may be provided at three or more locations. Further, an example is shown in which the pivot shaft 40b is supported by the rear cover 31B and the pivot boss 40a is supported by the case body 31A, but the pivot shaft 40b is supported by the case body 31A. The pivot boss 40a may be implemented by adopting the pivot portion 40 supported by the rear cover 31B. Further, an example is shown in which the engagement depth of the pivot shaft 40b with respect to the pivot boss 40a in the upper pivot portion 40 is deeper than the engagement depth of the pivot shaft 40b with the pivot boss 40a in the lower pivot portion 40. However, the engagement depth of the pivot shaft 40b in the lower pivot portion 40 may be deeper than the engagement depth of the pivot shaft 40b in the upper pivot portion 40.

(4) In the above-described embodiment, an example in which the draining straw dropper 11 and the shredded straw discharging device 12 are provided is shown, but only one of the draining straw dropper 11 and the shredded straw discharging device 12 is provided. You may. Further, both the draining straw dropper 11 and the shredded straw discharging device 12 may not be provided. Further, when the exhaust straw dropper 11 is provided, instead of supporting only the guide plate 69 and the exhaust straw dropper main body 68 on the rear cover 31B, the guide plate 69, the exhaust straw dropper main body 68, the drop control rod 66, and the guide rod 70 are provided. All may be supported by the rear cover 31B.

(5) In the above-described embodiment, the drive blade 34 is changed to a state in which the left end of the drive shaft 34a is supported by the left wall 31L and the right end of the drive shaft 34a projects to the outside of the case 31. Although an example is shown, the drive shaft 34 is changed to a state in which the left end portion of the drive shaft 34a protrudes to the outside of the case 31 while the right end portion of the drive shaft 34a is supported by the right side wall 31R. A configuration may be adopted in which the cutting blade 34b is inserted and removed from the left end of the 34a.

(6) In the above-described embodiment, an example is shown in which the horizontal holding mechanism 59, the regulating mechanism 61, and the guide mechanism 65 are each composed of shared members (swing support 55a, case side member 60). It may be constructed and carried out by the dedicated member of.

(7) In the above-described embodiment, an example in which the horizontal holding mechanism 59, the regulating mechanism 61, and the guide mechanism 65 are provided is shown, but only one of the horizontal holding mechanism 59, the regulating mechanism 61, and the guide mechanism 65 is provided. Alternatively, only one of the two may be provided and carried out. Further, it may be carried out without providing all of the horizontal holding mechanism 59, the regulating mechanism 61 and the guide mechanism 65.

(8) In the above embodiment, an example in which the through hole 47 is provided is shown, but it may be carried out without providing the through hole 47.

(9) In the above-described embodiment, the detection unit 81 may not be provided, as shown in the example in which the detection unit 81 is provided.

The present invention can be applied to a combine in which the front-rear direction of the threshing device is set to the front-rear direction of the machine, and a combine in which the front-back direction of the threshing device is set to the side-to-side direction of the machine.

9 Threshing device 10 Waste straw cutting device 13 Grain tank 31 Case 31A Case body 33 Guide member 34 Drive blade 34a Drive shaft 34b Cutting blade 35 Blade 35a Cutting shaft 35b Lock mechanism (lock bolt)
40 Pivot branch 40a Pivot boss 40b Pivot shaft 41 Support member 68 Exhaust straw dropper (Exhaust straw dropper body)
69 Exhaust straw dropper (guide plate)
74 Mounting part
83 Horizontal cover P2 Pivot axis core

Claims (4)

A threshing device that threshes the harvested culm,
A waste straw cutting device, which is connected to the rear part of the threshing device and cuts the waste straw after the threshing process, is provided.
The exhaust wall cutting device includes a drive shaft, a drive blade body having a plurality of cutting blades supported by the drive shaft, a cutting shaft parallel to the drive shaft, and the cutting shaft supported by the cutting shaft. A receiving blade having a plurality of receiving blades corresponding to the cutting blade, a case for accommodating the driving blade and the receiving blade, and a drive shaft provided on the side of the case separately from the case. Is equipped with a horizontal cover, which covers the mechanism that transmits power to the blade.
The case is provided with a case body having an open rear portion and a rear cover for closing the rear portion of the case body.
The rear cover is in a closed state in which the drive blade is closed from the rear by swinging with the pivot axis along the vertical direction of the machine as a swing fulcrum, and the cutting process by the waste wall cutting device is possible. A combine that can be changed to an open state in which the drive blade is opened rearward, separately from the horizontal cover. A threshing device that threshes the harvested culm,
A waste straw cutting device, which is connected to the rear part of the threshing device and cuts the waste straw after the threshing process, is provided.
The exhaust wall cutting device includes a drive shaft, a drive blade body having a plurality of cutting blades supported by the drive shaft, a cutting shaft parallel to the drive shaft, and the cutting shaft supported by the cutting shaft. A receiving blade having a plurality of receiving blades corresponding to the cutting blade, a driving blade, and a case for accommodating the receiving blade are provided.
The case is provided with a case body having an open rear portion and a rear cover for closing the rear portion of the case body.
The rear cover can be changed into a closed state in which the drive blade is closed from the rear to enable cutting processing by the waste straw cutting device, and an open state in which the drive blade is opened rearward. ,
It is provided with a threshing device and a grain tank which is provided in a state of being lined up in the horizontal direction of the machine and collects and stores grains obtained by the threshing process.
The rear cover is provided with a pivot portion provided on the lateral end side portion of the rear cover on the grain tank side and having a pivot axis along the vertical direction of the machine body.
Said rear cover, Ri state changeable der in said open state and said closed state by the swinging of the said pivot shaft core to the swing fulcrum,
A pivot boss provided on one of the case body and the rear cover, and a pivot provided on the other side of the case body and the rear cover, and inserted into and engaged with the pivot boss on the pivot portion. With a support shaft,
A locking mechanism for holding the rear cover in the closed state is provided.
The pivotal branch is provided at multiple locations above and below.
In each of the upper and lower plurality of pivotal portions, one of the pivotal shaft and the pivotal boss is engaged with the other of the pivotal shaft and the pivotal boss so as to be detachably engaged from above. Is configured in
In the vertically adjacent pivots, the engagement depth of the pivot shaft with the pivot boss in the lower pivot and the engagement depth of the pivot shaft with the pivot boss in the upper pivot are. Different combine. The combine according to claim 2 , further comprising a support member attached to the case body and supporting one of the pivot boss and the pivot shaft. The first guidance state for guiding the waste straw after the threshing treatment to flow into the inside of the case and the guidance for guiding the waste straw after the threshing treatment to flow out to the rear outside of the case to the waste straw cutting device. A guide member that can change the state to the second guide state is provided,
The rear cover is provided with a mounting portion capable of supporting a drainage straw dropper that discharges a set amount of the drainage straw that has flowed out to the rear outside of the case when the guide member is in the second guide state.
The combine according to any one of claims 1 to 3 , wherein the exhaust straw dropper is configured to move together with the rear cover when the rear cover changes state.

Images