JPH104761A - Threshing unit structure of combine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To facilitate attachment and detachment of a handling cylinder in a threshing unit in which a front wall of a handling room can be freely opened and closed and a handling cylinder is detachable.
The maintenance of the power transmission mechanism to the handling cylinder is facilitated. SOLUTION: A handling room for accommodating a handling cylinder is composed of a fixed wall fixed to a machine frame and a rotating wall separate from the fixed wall, and the fixed wall has a rotating wall. A power transmission mechanism for transmitting the power to the handling cylinder is provided on the side of the rotating wall body so that the body can be freely opened and closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure for a threshing unit of a combine.

[0002]

2. Description of the Related Art Conventionally, in a threshing unit of a combine, a handling drum pivotally supported in a handling room is driven by power from a motor unit transmitted through a belt-type power transmission mechanism.

[0003] There is also a handling room which is composed of a fixed wall fixed to a machine frame and a pivotable wall which can be freely opened and closed, and the rotating wall is opened so that a handle cylinder can be attached and detached. In the handling room, the power transmission mechanism is provided on the fixed wall side fixed to the machine frame.

[0004]

However, if the power transmission mechanism is provided on the fixed wall side, since a straw processing section, a grain tank, and a grain culm transport mechanism are provided near the threshing section, the power transmission mechanism is fixed. There is a problem that the space near the wall is narrow and maintenance of the power transmission mechanism is difficult.To solve this problem, if the power transmission mechanism is arranged on the rotating wall side, the rotating wall will be opened. Then, there is a problem that the interlock belt comes off the output pulley.

Further, when the rotating wall body is opened, the rotating wall body is swung without being fixed, hindering the operation of taking out the handling cylinder, and causing problems such as being damaged by contact with other members. .

[0006]

Therefore, in the present invention, the handling room accommodating the handling cylinder is constituted by a fixed wall fixed to the machine frame, and a rotating wall separate from the fixed wall. A threshing unit for a combine, wherein a turning wall is attached to the fixed wall so as to be openable and closable, and a power transmission mechanism for transmitting power to a handling cylinder is provided on the turning wall. It does not provide a structure.

[0007] The present invention also has the following features.

The handling cylinder is rotatably supported by a rotating-wall-side support shaft pivotally supported by the rotating wall and a fixed-wall-side supporting shaft pivotally supported by the fixed wall. Linking the wall-side support shaft and driving the straw processing unit via the fixed wall-side support shaft.

[0009] A detent mechanism is provided between the fixed wall and the rotating wall so that the rotating wall can be temporarily fixed at a plurality of open positions.

The power transmission mechanism includes an output pulley fitted to an output shaft on the machine frame side, and a passive pulley fitted to a rotating wall side support shaft pivotally supported by the rotating wall side and operatively connected to the handling cylinder. And an interlock belt wound around each of the pulleys, and the ears of the output pulley project outward in a direction more outward than the interlock belt wound around the output pulley.

[0011]

Embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show a combine A having a threshing unit structure according to the present invention. In the drawings, reference numeral 1 denotes a track frame equipped with a pair of right and left crawler-type traveling devices 2; A machine erected on the truck frame 1,
Numeral 4 denotes a threshing unit in which a feed chain 5 is stretched to the left and a handling cylinder 6 and a processing cylinder 7 are built in. Numeral 8 denotes a mowing unit equipped with a cutting blade and a grain culm transport mechanism. A straw processing unit provided with 11, a driving unit 12 provided with a driver's seat 13 and a driving operation unit 14, a motor unit 15 incorporating an engine 16, 17
Is a grain tank, 18 is a frying cylinder, 19 is a swing sorting section,
While traveling on the field by the operation of the operation operation unit 14, the grain stalks cut by the cutting unit 8 are threshed by the threshing unit 4, and the thresh is separated into grains and straw by the rocking sorting unit 19. The grains are stored in the grain tank 17 via the fryer cylinder 18, and the straw is discharged outside the machine via the straw chain 10 and the straw tine 11 of the straw processing unit 9. .

The threshing unit 4 includes, as shown in FIGS.
A handling cylinder 6 having a shaft center in the front-rear direction is rotatably supported inside a handling chamber 21 having a grain culm passage 20 extending between the lower front side and the lower left side. Many protruding teeth 22
Thus, the grain is threshed from the tip of the cereal stem passing through the cereal stem passage 20.

As shown in FIG. 4, a large number of handling cylinders 6 are formed on an outer peripheral surface of a drum 26 comprising a substantially cylindrical outer peripheral wall 23 and front and rear discs 24 and 25 closing front and rear end surfaces of the outer peripheral wall 23. The handling teeth 22 are protruded, and the handling cylinder shaft has a hexagonal cross section at the center of the front and rear disks 24, 25.
27, and is fixed to the front and rear disks 24, 25 via front and rear flanges 28, 29 fixed to the front and rear ends of the handling cylinder shaft 27, respectively.

As shown in FIGS. 3 to 5, the handling room 21 includes an upper cover 30 as an openable and closable rotating wall E forming an upper surface and an upper portion on a left side surface, and a crimp net 31 forming a lower surface. It is formed of a front wall 32 that can be opened and closed, a right wall 34 and a rear wall 35 as a fixed wall body D fixed to the machine frame 33, and a left front end of the upper cover 30 and a left end of the front wall 32. The upper cover 30 and the front wall 32 are kept in a closed state by a lock mechanism 36 that can be coupled and released. In the figure, 37 is a position regulating member,
The upper cover is provided below the lock mechanism 36.
Locking mechanism by restricting the coupling position between 30 and front wall 32
36 facilitates the locking operation. In FIG. 5, 32b
Is a safety cover that covers the power transmission mechanism B.

As shown in FIG. 3, the upper cover 30 has an inner lid 39 curved from the middle to the left edge, and a combine A
The upper end of the upper cover 30 is pivotally connected to a pivot 41 provided on the upper edge of the right wall 34 so as to be rotatable. The upper and left side surfaces of the handling room 21 can be opened.

As shown in FIGS. 3 and 4, the crimping net 31 is a wire netting which is curved so as to maintain a fixed gap with the rotation locus of the tip of the tooth 22 and opens the upper cover 30. Then, the crimping net 31 can be removed while being rotated counterclockwise as viewed from the front. In FIG. 4, reference numeral 42 denotes a crimp net.
A partitioning plate protruding from the inner surface of the crimping net 31 for increasing threshing efficiency. By turning the crimping net 31 counterclockwise as described above, the crimping net 31 does not interfere with the teeth 22 of the handling cylinder 6.
31 and the partition plate 42 can be integrally removed, and if the crimp net 31 is provided, the handling cylinder 6 can be easily removed. In FIG. 4, reference numeral 43 denotes a front winding prevention plate, and reference numeral 44 denotes a rear winding prevention plate.

As shown in FIGS. 4 to 6, the front wall 32 is provided with a gap between the lower end edge and the front end edge of the crimping net 31 so as to form a grain culm passage.
The lower half 32a of the front wall is formed in a thin box shape to enhance rigidity, and a plurality of hinge rotation shafts 45 attached to the front edge of the right wall 34 are attached to the right end of the front wall 32. The rim is pivotably connected to the front so that the front surface of the handling chamber 21 can be opened.

A seal member made of a flexible material such as sponge can be provided in the gap between the rotating wall E and the fixed wall D to prevent dust from being ejected from the inside of the handling chamber 21. .

The handle cylinder 6 includes a front shaft support provided on a front wall 32.
The front support 46 is rotatably supported between a rear support 46 and a rear support 47 provided on the rear wall 35. The front support 46 is, as shown in FIGS. A rotating shaft side support shaft insertion hole 48 is formed substantially at the center of the rotation wall body side support shaft insertion hole 48, and the rotating wall body side support shaft 49 inserted through the rotation wall body side support shaft insertion hole 48 is connected to the outer surface of the lower half 32a of the front wall. It is rotatably supported by a front bearing 51 in a flange-type front bearing box 50 mounted substantially at the center, and one engagement claw 53 of a dog clutch 52 is connected to the inner end of a rotating wall side support shaft 49. At the same time, the other engaging claw 54 of the dog clutch 52 is connected to the front end of the hexagonal tubular handle cylinder shaft 27 through which the axis of the handle cylinder 6 is inserted, and the front wall 32 closes the handle chamber 21. When the above engagement claw 53, 54
However, when engaged with each other and the front wall 32 opens the handling chamber 21,
The engagement is released.

Further, a short cylindrical centering ring 55 is fitted around the outer periphery of the engaging claw 54 on the side of the handling cylinder 6, and the front center end of the centering ring 55 is expanded forward. When the dog clutch 52 is meshed with the tapered guide surface 55a, the guide surface 55a is slidably contacted with the outer peripheral surface 53b of the engaging claw 53 on the rotating wall side support shaft 49 side. Dog clutch 52 on the handlebar shaft 27 side supported by the rear shaft support 47
To align the axis of the barrel shaft 27 with the axis of the pivoting wall side support shaft 49, and the inner peripheral surface of the centering ring 55 and the engaging claw 53 of the pivoting wall side support shaft 49 side. By contact with the outer peripheral surface, the state where the axes are aligned is maintained, and power is transmitted by the respective engagement claws 53 and 54.

FIG. 6 shows another embodiment of shaft alignment.
As shown by the dashed line, the tapered projection 90 is formed at the center of the front end face of the handling cylinder shaft 27, while the tapered hole 91 corresponding to the tapered projection 90 is formed at the center of the inner end face of the rotating wall side support shaft 49. Alternatively, the indentation of the tapered projection 90 into the tapered hole 91 may cause the axis of the handle shaft 27 to coincide with the axis of the rotating wall side support shaft 49.

In particular, the dog clutch 52 is disposed near an intersection of a perpendicular line drawn down from the axis of the rotating shaft 45, which is the center of the opening and closing operation of the front wall 32, to the axis of the handling cylinder 6, At the final connecting position of 52, the direction of separation of the engaging claws 53, 54 is substantially parallel to the axis, and the centering action by the guide surface 55a can be received over the entire circumference.

As shown in FIGS. 4 and 8, the rear shaft support portion 47 has a fixed wall side support shaft insertion hole 58 formed at the center of the rear wall 35, and the fixed wall side support shaft insertion hole 58 is inserted therethrough. The fixed wall body side support shaft 59 is rotatably supported by a rear bearing 61 in a flange type rear bearing box 60 attached to the rear surface of the rear wall 35,
A hexagonal indentation 62 at the inner end of the fixed wall side support shaft 59
To be inserted into the rear end of the hexagonal tubular handle shaft 27 described above, and a straw processing unit drive pulley 56 is fitted to the outer end of the fixed wall side support shaft 59, and the straw is removed. A straw drive unit driving belt 57 for driving the straw processing unit is wound around the processing unit drive pulley 56.

In particular, as shown in FIGS. 4 and 8, the front end of the indentation body 62 can be inserted into the inside of the rear flange 29, and the handle cylinder 6 cantilevered when the front wall 32 is opened. The rigidity of the part is increased.

With this configuration, when the lock mechanism 36 is released, the upper cover 30 is opened, the crimp net 31 is removed, and when the front wall 32 is released, the engagement of the dog clutch 52 is released.
The connection between the rotating wall side support shaft 49 and the front end of the handle cylinder shaft 27 is released. In this state, the handling cylinder 6 can be easily taken out of the handling chamber 21 by pulling the handling cylinder 6 forward. The handling cylinder 6 can be mounted in the handling room 21 in the reverse order.

The power transmission mechanism B to the handling cylinder 6 is shown in FIGS.
As shown in the figure, a gear box 64 having a built-in meshing bevel gear 63 is arranged on the right outside the handling chamber 21, and an input pulley 66 is fitted to a left-right input shaft 65 extending from the gear box 64, An output pulley 69 is fitted to the front end of an output shaft 68 extending in the front-rear direction extending from a gear box 64, and is connected to the engine 16 of the motor unit 15 via an input belt 67.
A passive pulley 70 is fitted to the front end of the engine, and an interlock belt 71 is wound between the output pulley 69 and the passive pulley 70 to
The power from the motor 16 is transmitted to the handling cylinder 6. In particular, the interlocking belt 71, the output pulley 69, and the passive pulley 70 are formed by a V belt and a V pulley, respectively.

A tension mechanism 72 is attached to the outer surface of the front wall 32 to apply a required tension to the interlock belt 71 to prevent the interlock belt 71 from coming off and a reduction in transmission power. The tension mechanism 72 forms the outer periphery of the front bearing box 50 in a circular cross section to form a tension fulcrum 73, and the bending portion of a substantially L-shaped tension lever 74 is rotatably fitted to the tension fulcrum 73, A tension pulley 75 is pivotally supported at one end of the tension lever 74, and a spring seat 77 in which an adjustment bolt 76 is screwed is provided on the outer surface of the front wall 32 to protrude.
A tension spring 78 is suspended between the adjustment bolt 76 and the other end of the tension lever 74, and the outer circumference of the interlocking belt 71 is pressed inward by the tension of the tension spring 78.

As shown in FIG. 9, when the front wall 32 is opened, the interlocking belt 71 is prevented from coming off, and the interlocking belt 71 is easily bent.

The output pulley 69 is provided on the outer surface of the output pulley 69.
Attachment of the retaining ring 79 as the ear F of the above, the outer periphery of the retaining ring 79 is projected in the outer peripheral direction by a height h1 from the outer periphery of the interlocking belt 71 wound around the output pulley 69,
The interlock belt 71 is prevented from coming off.

By making the lateral width w1 of the contact surface 80 of the tension pulley 75 with the interlock belt 71 larger than the belt width w2 of the interlock belt 71, the interlock belt 71 is allowed to slide laterally and the front wall 32 is moved. When opened, the interlocking belt 71 is easily bent.

The height h2 of the flange 83 of the tension pulley 75 is
The height is higher than the height h3 of the interlocking belt 71, and a detachment stopper 86 having a substantially L-shaped cross section is provided below the tension pulley 75.
And the stopper 86 is made to face the outer peripheral surface of the interlocking belt 71 to prevent the interlocking belt 71 from coming off.

A refraction assisting device 87 having a substantially L-shaped cross section is protruded from the front of the machine frame 33 in the vicinity of the hinge pivot shaft 45 to regulate the refraction position of the interlocking belt 71. Irrespective of the opening and closing of the wall 32, the tension of the interlocking belt 71 is maintained substantially constant, so that the interlocking belt 71 is easily bent and the interlocking belt 71 is prevented from coming off.

3 and 5, reference numeral 38 denotes a detent mechanism which can temporarily fix the opening of the front wall 32 in two stages. As shown in FIG. Rotating shaft 45
A detent rod insertion hole 38a is drilled in the vicinity, and a substantially round bar-shaped detent rod 38b projecting forward from the front of the machine frame 33 is inserted into the detent rod insertion hole 38a.
Detent grooves 38c, 38d, and 38e are provided around the periphery, and a substantially washer-shaped stopper 38f is fitted at the end, while a support shaft 38g projects forward from the front surface of the front wall 32 below the detent rod insertion hole 38a. Then, the lower end of a substantially round bar-shaped locking bar 38h is pivotably connected to the supporting shaft 38g, and the middle of the locking bar 38h is connected to the detent bar.
38b, it can be engaged with any of the detent grooves 38c, 38d, 38e, and a substantially plate-shaped spring support 38i is protruded from the front surface of the front wall 32, and an adjusting bolt 38j is screwed into the spring support 38i. The locking rod 38h is attached in the direction of the detent rod 38b by a detent spring 38L stretched between the tip of the adjusting bolt 38j and a spring hook 38k connected to the upper end of the locking rod 38h. The position of the relationship between the detent bar 38b and the front wall 32 is maintained.

Accordingly, when the front wall 32 is closed, the locking rod 38h is inserted into the detent groove 38c closest to the machine frame 33, and the front wall 32 is closed.
When the front wall 32 is opened and the front wall 32 is opened, the locking rod 38h is inserted into the foremost or middle detent groove 38d, 38e, and the minimum front wall necessary for removing the handling cylinder 6 is required. It can be temporarily fixed at 32 opening positions. Further, the front wall 32 can be fully opened until the locking bar 38h and the detent bar 38b are completely separated from each other. At this time, the spring holder 38m projecting from the front surface of the front wall 32 and the spring hook 38k are used. The contraction of the detent spring 38L is limited by the contact, so that when the front wall 32 is closed again from the fully opened state, the locking bar 38h holds an appropriate position.

FIG. 11 shows a detent spring 38n of another embodiment, in which the amount of projection of the spring support 38i from the front wall 32 is increased, and the inclination angle θ in the direction in which the locking rod 38h is pulled by the detent spring 38n is increased. By providing a component force for pulling the detent bar 38b forward, the closing before the locking of the front wall 32 is ensured to facilitate the locking operation.

FIGS. 12 to 14 show various types of backwind prevention plates.
In the figure, reference numeral 44a denotes a rotating disk mounted on the outer surface of the rear disk 25 of the handling cylinder 6, 44b denotes a front lip formed on the outer peripheral edge of the rotating disk 44a, and 44c denotes a front lip. The fixed side disk 44d attached to the inner surface of the rear wall 35 of the handling room 21 is a rear lip portion formed on the outer peripheral edge of the fixed side disk 44c, and the lip portions 44b and 44d are arranged with a narrow gap, The wrapping of the cereal stem around the handling shaft 27 is prevented.

FIG. 15 shows a scraper 24a attached to the front disk 24 of the handling cylinder 6 and a front winding prevention plate attached to the inner surface of the front wall 32.
43, a notch 24b is formed in the front winding prevention plate 43, and when the front wall 32 is opened and closed, the scraper 24a passes through the notch 24b to open and close the front wall 32. Easy going. Also, as shown in FIG. 16, the front and rear edges 24c, 24d of the cutout 24b are inclined by an angle 24e of 45 ° or less so that the grain stalk does not catch on the edges 24c, 24d.

17 and 18 show a stopper device 95 for holding the upper cover 30 in an open state. The stopper device 95 extends to the rear side of the rear wall 35 of the handling chamber 21 in the left-right direction. A stopper plate 95b having a long hole 95a is attached, a round hole 95c is formed on the pivot 41 side of the long hole 95a, and a downwardly bent engaging portion 95d is formed on the opposite side, and a support rod is provided in the long hole 95a. 95
e, the lower end 95f bent into a substantially L-shape is inserted, and the upper end 95g of the support rod 95e is inserted into the front and rear walls 95h, 95i of the upper cover 30.
When the upper cover 30 is opened, the lower end of the support rod 95e is locked by the locking portion 95d, and the open state is maintained. When the upper cover 30 is closed, the lower end of the support bar 95e is housed in the round hole 95c.

Further, since the upper end 95g of the support rod 95e is located at the center of the upper cover 30 in the front-rear direction, the upper cover 30 is supported near the center of gravity, so that the upper cover 30 is opened. Can be stably supported.

FIG. 19 shows a reinforcing member 96 for increasing the rigidity of the handling room 21. A rear end 96a of a band-shaped reinforcing member 96 is pivotally attached to the outer edge of the rear wall 35. And the reinforcement member 96
A hook portion 96b that opens downward is formed at the front end, and the hook portion 96b projects from the outer edge of the front wall 32 to the locking pin 96.
c is designed to engage freely.

FIG. 20 shows that the reinforcing member 96 is inclined by lowering the projecting position of the locking pin 96c, the opening direction of the hook portion 96b is inclined obliquely rearward and downward, and the front wall 32 is opened. Then, the locking pin 96c receives a force in the depth direction of the hook 96b, so that the engagement between the hook 96b and the locking pin 96c is hard to be released. Further, the rigidity can be further increased by crossing the two reinforcing members 96.

FIGS. 21 and 22 show a power transmission mechanism 97 according to another embodiment, in which a left-right input shaft 97a is interlocked to a vertical intermediate shaft 97c via a first bevel gear case 97b. The intermediate shaft 97c is operatively connected to the left and right output shaft 97e via a second bevel gear case 97d, and the output shaft 97e is operatively connected to the rotating wall side support shaft 49 via a third bevel gear case 97f. The first and second bevel gear cases have the rotating wall side support shaft 49 interlockingly connected to the handle barrel shaft 27 via a dog clutch 52.
97b and 97d are rotatably connected via a spigot part 97g,
The front wall 32 can be opened and closed about the intermediate shaft 97c.

FIG. 23 shows the first and second bevel gear cases 97.
b, 97d is retracted to be positioned right beside the dog clutch 52 so that the dog clutch 52 can be smoothly engaged and disengaged.

[0045]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the handling room accommodating the handling cylinder is composed of a fixed wall fixed to the machine frame and a rotating wall separate from the fixed wall. A safety cover that covers the power transmission mechanism is attached to the wall body by providing a power transmission mechanism for transmitting power to the handling cylinder on the side of the rotation wall that is freely openable and closable. Since the handling room can be opened while being held, the handling cylinder can be easily attached and detached, and the power transmission mechanism can be arranged at a position where maintenance can be easily performed.

According to the second aspect of the present invention, the handle cylinder is rotatably supported by the pivoting wall-side supporting shaft pivotally supported by the pivoting wall and the stationary wall-side supporting shaft pivotally supported by the stationary wall. In addition, the handling cylinder and the fixed wall side support shaft are interlocked and connected to each other, and the straw discharge processing unit is driven via the fixed wall side support shaft, thereby simplifying the driving structure of the straw processing unit. it can.

According to the third aspect of the present invention, a detent mechanism for temporarily fixing the rotating wall at a plurality of open positions is provided between the fixed wall and the rotating wall. It is possible to know the minimum required degree of opening of the rotating wall, and to open the rotating wall more than necessary to prevent contact with other members and damage caused by the contact.

According to the fourth aspect of the present invention, the power transmission mechanism includes an output pulley fitted to the output shaft on the machine frame side and a rotating wall side pivotally supported by the rotating wall side and interlockingly connected to the handle cylinder. It has a passive pulley fitted to the support shaft and an interlock belt wound around each of the pulleys, and furthermore, makes the ears of the output pulley protrude in the outer circumferential direction more than the interlock belt wound around the output pulley. Thus, even if the rotating wall is opened with the interlocking belt attached, the interlocking belt is prevented from coming off, so that the opening / closing operation of the rotating wall and, consequently, the attaching / detaching operation of the handling drum can be simplified.

[Brief description of the drawings]

FIG. 1 is a side view of a combine having a threshing unit structure of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of a threshing unit.

FIG. 4 is a sectional plan view of a threshing unit.

FIG. 5 is a plan view of a front wall.

FIG. 6 is a cross-sectional plan view of a front wall.

FIG. 7 is a cross-sectional plan view of a rotation wall-side support shaft.

FIG. 8 is a sectional plan view of a fixed-wall-side support shaft.

FIG. 9 is a partial cross-sectional plan view of a power transmission mechanism.

FIG. 10 is a partial cross-sectional plan view of the detent mechanism.

FIG. 11 is a partial cross-sectional plan view of a detent mechanism according to another embodiment.

FIG. 12 is a cross-sectional plan view of a rear winding prevention plate.

FIG. 13 is a cross-sectional plan view of a rear winding prevention plate according to another embodiment.

FIG. 14 is a cross-sectional plan view of a rear winding prevention plate according to another embodiment.

FIG. 15 is a front view of a front winding prevention plate.

FIG. 16 is a partially enlarged front view of the front winding prevention plate.

FIG. 17 is a side view of the stopper device.

FIG. 18 is a front view of the stopper device.

FIG. 19 is a perspective view of a reinforcing member.

FIG. 20 is a side view of a reinforcing member.

FIG. 21 is a front view of a power transmission mechanism according to another embodiment.

FIG. 22 is a plan view of a power transmission mechanism according to another embodiment.

FIG. 23 is a plan view of a power transmission mechanism according to another embodiment.

[Description of Signs] A Combine B Power transmission mechanism D Fixed wall E Rotating wall F Ear 6 Handling cylinder 9 Drainage processing unit 21 Handling room 32 Front wall 33 Machine frame 38 Detent mechanism 49 Rotating wall side support shaft 59 Fixed wall side support shaft 68 Output shaft 69 Output pulley 70 Passive pulley 71 Interlock belt

Claims (4)

[Claims] A handling room (21) accommodating a handling drum (6) is mounted on a machine frame (3).
3) and a fixed wall body (D) fixed to the fixed wall body (D) and a fixed wall body (D). (E) is installed to be openable and closable, and
(E) Power transmission mechanism for transmitting power to the cylinder (6)
(B) The structure of the threshing unit of the combine, characterized in that: 2. A rotating wall side support shaft (49) pivotally supported by a rotating wall (E), and a fixed wall side support shaft (4) axially supported by a fixed wall (D). 59), and the handle cylinder (6) and the fixed wall side support shaft (59) are interlockingly connected to each other, and through the fixed wall side support shaft (59), the straw processing unit ( 9) The threshing unit structure of the combine according to claim 1, wherein 3. A detent mechanism (38) is provided between the fixed wall (D) and the pivoting wall (E) for temporarily fixing the pivoting wall (E) at a plurality of open positions. The threshing part structure of a combine according to claim 1, characterized in that: 4. The power transmission mechanism (B) includes an output pulley (69) fitted to an output shaft (68) on the machine frame (33) side, and a rotating wall (E).
A passive pulley (70), which is rotatably supported on the side and is fitted to a pivoting wall side support shaft (49) interlockingly connected with the handling cylinder (6);
9) equipped with an interlock belt (71) wound around (70), and
The threshing of a combine according to claim 1, wherein the ear portion (F) of the output pulley (69) is protruded in an outer peripheral direction from an interlocking belt (71) wound around the output pulley (69). Part structure.