JP7109292B2 - combine - Google Patents

Description

The present invention includes a threshing device for threshing a harvest harvested by a harvesting section, a threshing tank for storing the threshed grains, and the threshing device and the threshing tank. and a feeding and conveying device for supplying the threshed grains to the threshing tank.

In the combine harvester described above, for example, as shown in Patent Document 1, the conveying terminal side portion of the feeding and conveying device (the grain lifting device of Document 1) is the wall portion of the threshing tank (the grain tank of Document 1) (Document 1). 1 bottom wall) is inserted into the threshing tank through a through hole.

JP 2014-14298 A

In the above combine harvester, the through hole of the threshing tank cannot be made too large so that the threshing does not leak out of the through hole. It hangs. If the threshing tank is provided with strength to withstand the stress, such as by thickening the wall of the threshing tank, the threshing tank is a large component, which increases the cost. Also, the threshing tank becomes heavy.

The present invention provides a combine harvester capable of preventing deformation and breakage of a threshing tank while suppressing an increase in cost and weight.

The combine according to the invention is
A threshing device for threshing the harvested product harvested by the harvesting unit, a threshing tank that is provided without changing its attitude and stores the threshing, and is provided across the threshing device and the threshing tank. a feeding and conveying device that is provided in a continuous state from a part to a terminal end and that supplies the threshing obtained by the threshing device to the threshing tank; , a sealing material inserted into the inside of the threshing tank through a through hole provided in the wall of the threshing tank, and interposed between the outer peripheral portion of the through hole and the conveying terminal side portion; The sealing member is interposed in a state in which relative movement with respect to the through hole in the radial direction is prevented and in a state in which relative movement in the insertion direction with respect to the through hole is permitted.

According to this configuration, since the relative vibration between the threshing tank and the feeding and conveying device in the direction in which the feeding and conveying device is inserted into the threshing tank is absorbed by the sealing material, the threshing tank can be installed without modification of the threshing tank. The applied stress can be reduced, and deformation and damage of the threshing tank can be prevented while suppressing an increase in cost and weight.

In the present invention, the sealing material includes a base portion that abuts on the inner surface of the wall portion, and a sliding contact portion that extends from the base portion along the inserting direction and along the outer peripheral surface of the conveying terminal side portion. and are preferably provided.

According to this configuration, even if the sliding contact area between the supply/conveyance device and the sealing material is widened by the sliding contact portion, the sealing material is firmly supported by the wall portion by the base portion. It slides smoothly without twisting.

In the present invention, it is preferable that the sealing material is composed of a plurality of divided sealing materials that are divided in the circumferential direction of the transportation terminal side portion.

According to this configuration, the sealing material can be divided into a plurality of split sealing materials and attached, so that they are easy to attach.

In the present invention, the threshing tank is provided with a lower tapered portion formed at the bottom of the threshing tank, and a bottom screw provided inside the lower tapered portion for discharging threshing grains from the threshing tank. and a discharge port that opens in the lower narrowed portion and enables the discharge of threshed grains by the bottom screw, and the through hole is provided in a wall portion of the wall portion that is closer to the bottom portion. It is preferable that a support frame is provided which is open, is connected to the upper end portion of the conveying end portion and the inside of the grain threshing tank, and supports the upper end portion.

According to this configuration, of the portion on the transport end side of the supply transport device, the upper end portion away from the portion on which the sealing material acts is supported by the support frame, so that the swinging movement of the portion on the transport end side is suppressed and the transport end portion is supported. The threshing tank is restrained from being stressed by the wobbling motion of the side part.

It is a right view which shows the whole combine. It is a left view which shows the whole combine. It is a top view which shows the whole combine. It is a left view which shows a supply conveyance apparatus. It is a vertical front view which shows the upper part of a slat conveyor. It is a vertical right view which shows the upper part of a slat conveyor. FIG. 4 is a right side view showing a position adjusting mechanism and a positioning mechanism; FIG. 4 is a front view showing a position adjusting mechanism and a positioning mechanism; It is a sectional view showing a screw conveyor penetration part of a threshing tank. FIG. 4 is a plan view showing a sealing material; FIG. 4 is a perspective view of a sealing material divided into divided sealing materials; It is a front view which shows a bottom screw and an inspection door. Fig. 10 is a side view showing a connecting portion between a No. 2 screw conveyor and a return screw conveyor; FIG. 4 is a cross-sectional view showing a connecting portion between a No. 2 screw conveyor and a return screw conveyor;

An embodiment, which is an example of the present invention, will be described below with reference to the drawings.
1, 2 and 3, the direction of arrow B is the "back of the machine", and the direction of arrow B shown in FIGS. , the direction of arrow D is defined as ``downward,'' the direction of arrow L shown in FIG. 3 is defined as ``left,'' and the direction of arrow R is defined as ``right.

[Regarding the overall configuration of the combine harvester]
As shown in FIGS. 1, 2 and 3, the combine has a body frame 1, a pair of left and right front wheels 2 drivably mounted on the front part of the body frame 1, and a steerable wheel on the rear part of the body frame 1. It has a fuselage having a pair of left and right rear wheels 3 mounted on the body. The body frame 1 is provided with a pair of left and right main frames 1a extending in the longitudinal direction of the body. A boarding-type driving section 4 is formed in the front part of the body. The driving unit 4 is provided with a cabin 5 covering a boarding space. A harvesting and conveying device 6 is connected to the front portion of the body frame 1 . The harvesting and conveying device 6 includes a harvesting section 7 which is provided in front of the machine body and which cuts and harvests the stalks of crops such as paddy rice, wheat, and rapeseed located in front of the machine body during work traveling, and A feeder 8 is provided to which the front part is connected and which conveys the reaping culms harvested by the harvesting part 7 . The feeder 8 is connected to the machine body frame 1 so as to move up and down with a connection axis P1 extending in the horizontal direction of the machine body as a swing fulcrum. The harvesting unit 7 is moved up and down between a lowering working state and a rising non-working state by swinging and raising the feeder 8 by extending and contracting a hydraulic lifting cylinder 9 connected to the feeder 8 . A threshing device 10 is provided at the rear of the machine body for receiving harvested culms transported by the feeder 8 as threshing objects, threshing the culms, and sorting the threshed products. Above the front part of the threshing device 10, a threshing tank 11 is provided for collecting and storing single grains as threshed grains transported from the threshing device 10 by the feeding and transporting device 30. As shown in FIG. A threshing discharge device 12 for discharging the stored grains is connected to the lower left side portion of the threshing tank 11 . A driving unit 14 having an engine 13 is formed above the rear part of the threshing device 10 .

[Regarding the configuration of the harvesting part]
In the harvesting section 7, as shown in FIGS. 1, 2, and 3, the uncut culms are combed into the culms to be harvested and the culms not to be harvested at the left and right ends of the front end of the harvesting section 7. A dividing divider 15 is provided. A rotary reel 16 is provided above the front portion of the harvesting section 7 to rake the tip side of the culm to be harvested backward. Behind the divider 15, a clipper-type reaping device 17 is provided for cutting the root of the culms that have been rake-in. An auger 18 is provided at the rear of the harvesting device 17 to gather harvested grain culms to the front side of the feeder 8 and feed the collected harvested grain culms as a whole from the base to the tip to the feeder 8 .

[Regarding the configuration of the supply and transport device]
As shown in FIGS. 1, 3, and 4, the feeding and conveying device 30 is a slat conveyor that extends along the vertical direction of the threshing tank 11 across the right lateral outer portion of the lower portion of the threshing device 10 and the rear portion of the threshing tank 11. 31 and a screw conveyor 32 provided over the top of the slat conveyor 31 and the inside of the threshing tank 11 .

As shown in FIG. 4, the slat conveyor 31 is provided with a carrying case 33 extending from the lower right lateral outer portion of the threshing device 10 to the lower rear portion of the threshing tank 11 . A lower end side portion of the conveying case 33 is connected to a conveying end portion of the No. 1 screw conveyor 10a provided in the threshing device 10 . Single grains obtained in the sorting section of the threshing device 10 are supplied to the inside of the lower end side portion of the conveying case 33 by the first screw conveyor 10a. An upper end portion of the conveying case 33 is connected to a conveying starting end portion of the screw conveyor 32 via a connection case 34 .

As shown in FIG. 4, a driving sprocket 35 as a driving rotating body is installed in the lower end portion of the carrying case 33 . One end of the screw shaft of the No. 1 screw conveyor 10a extends into the conveying case 33, and a drive sprocket 35 is supported by the extended portion of the screw shaft so as not to rotate relative to it. The driving sprocket 35 is rotatably supported by the conveying case 33 through the screw shaft of the first screw conveyor 10a, and is driven by the power of the first screw conveyor 10a.

As shown in FIGS. 4 and 5, a driven sprocket 36 as a driven rotating body is installed in the upper end portion of the carrying case 33 . The driven sprocket 36 is supported by the support shaft 37 so as not to rotate relative to it. A left end of the support shaft 37 is rotatably supported by a left support arm 38 via a bearing 39 a and a bearing case 39 . The left support arm 38 is provided laterally outside the left side wall 33 a of the carrying case 33 . A right end of the support shaft 37 is rotatably supported by a right support arm 38 via a bearing 39 a and a bearing case 39 . The right support arm 38 is supported laterally outside the right side wall 33 b of the carrying case 33 . The driven sprocket 36 is supported by the carrier case 33 via a support shaft 37 , left and right bearings 39 a , left and right bearing cases 39 , and left and right support arms 38 .

As shown in FIGS. 4, 5 and 6, an endless rotating chain 40 as an endless rotating body is wound over the driving sprocket 35 and the driven sprocket 36 . Transport bodies (slats) 41 are provided at a plurality of locations in the longitudinal direction of the endless rotating chain 40 . A conveying face member 42 is provided over the outer circumference of the driving sprocket 35 and the outer circumference of the driven sprocket 36 . The conveying surface 42 and the conveying case 33 form a conveying path 43 on which the conveying portion of the endless rotary chain 40 moves upward and the grains can be lifted by the conveying body 41 . The conveying face piece 42 is divided into a conveying face piece portion 42a on the conveying end side having a portion along the outer periphery of the driven sprocket 36 and a conveying face piece portion 42b other than the conveying face piece portion 42a on the conveying end side.

In the slat conveyor 31, single grains as the first processed material obtained by sorting by the threshing device 10 are supplied to the inside of the lower end side portion of the conveying case 33 by the first screw conveyor 10a. The driving sprocket 35 is driven by the power of the No. 1 screw conveyor 10a, the endless rotating chain 40 is driven by the driving sprocket 35, and the conveying body 41 is transported upward on the conveying path 43 by the endless rotating chain 40. The grains supplied to the inside of the transport case 33 are lifted on the transport path 43 by the transport body 41 and supplied to the screw conveyor 32 via the connection case 34 at the end of the transport path 43 .

[Regarding the configuration of the position adjustment mechanism]
As shown in FIGS. 5 and 7, a mounting portion 38a formed at the bottom of the right support arm 38 is engaged between the support portion 44 of the right side wall 33b and the right side wall 33b so as to be vertically slidable. The right support arm 38 is supported by the right side wall 33b so as to be vertically slidable. In the left support arm 38, similarly to the right support arm 38, a mounting portion 38a formed in the lower portion of the left support arm 38 is vertically slidable between the support portion 44 of the left side wall 33a and the left side wall 33a. is locked up. The left support arm 38 is supported by the left side wall 33a so as to be vertically slidable. As shown in FIG. 5, through holes 45 through which the support shafts 37 are inserted in the left side wall 33a and the right side wall 33b are long holes that allow the support shafts 37 to move in the direction along the conveying direction of the slat conveyor 31. is formed in That is, the left support arm 38 and the right support arm 38 are supported by the transport case 33 so as to be slidable in the transport direction of the slat conveyor 31 while supporting the support shaft 37 .

As shown in FIG. 5 , the transfer surface body portion 42 a on the transfer end side is connected to each of the left support arm 38 and the right support arm 38 by a connection bolt 46 . Spacers having a plate thickness equal to the wall thickness of the left side wall 33a and the right side wall 33b are provided between the left support arm 38 and the transfer surface body portion 42a and between the right support arm 38 and the transfer surface body portion 42a, respectively. 47 is interposed. The spacer 47 is inserted into the through holes 45 of the left side wall 33a and the right side wall 33b. When the left support arm 38, the right support arm 38, and the support shaft 37 are moved, the transfer surface body portion 42a follows the left and right support arms 38. As shown in FIG.

As shown in FIGS. 5 and 7, a guide mechanism 50 for guiding the movement of the left support arm 38 is provided across the left support arm 38 and the left wall 33a. A guide mechanism 50 for guiding the movement of the right support arm 38 is provided across the right support arm 38 and the right side wall 33b. As shown in FIGS. 5 and 7, the guide mechanism 50 of each of the left support arm 38 and the right support arm 38 includes a guide rod 51 provided on the support arm 38 and supported by the left side wall 33a and the right side wall 33b. A second holding member 52 is provided.

The guide rod 51 extends downward from a support portion 38b formed in the attachment portion 38a of the support arm 38, and is supported by the support arm 38 in a posture along the vertical direction. The second holding member 52 is supported by the support portion 44 so as to hold the guide rod 51 relatively movably. Specifically, the second holding member 52 is configured by a cylindrical member that holds the guide rod 51 so as to be relatively movable.

In the guide mechanism 50 for each of the left support arm 38 and the right support arm 38, when the support arm 38 is moved, the guide rod 51 is held by the second holding member 52 and moves to follow the support arm 38. 38 movement guidance is performed. As a result, the support arm 38 moves smoothly with respect to the support portion 44 without rattling.

As shown in FIGS. 6, 7 and 8 , the left support arm 38 and the right support arm 38 are connected by a connecting member 53 . The connecting member 53 is provided along the outer peripheral surface of the carrying case 33 . Specifically, the connecting member 53 is provided along the outer surface of the front wall 33 c of the carrying case 33 . The left support arm 38 and the right support arm 38 are interlocked by a connecting member 53 so as to interlock and move in the same moving direction. The left support arm 38 , the right support arm 38 , and the connecting member 53 constitute a connecting body 54 that connects both ends of the support shaft 37 .

As shown in FIGS. 6, 7 and 8, an adjusting rod 55 extends downward from the connecting member 53. As shown in FIGS. The adjusting rod 55 extends along the outer peripheral surface of the carrying case 33 in the same manner as the connecting member 53 . Specifically, the adjustment rod 55 extends along the outer surface of the front wall 33c of the carrying case 33. As shown in FIG. A middle portion of the adjusting rod 55 is held by a first holding member 56 so as to be relatively movable. The first holding member 56 is supported by the carrying case 33 . Specifically, the first holding member 56 is configured by a tubular member through which the adjusting rod 55 is inserted so as to be relatively movable.

A positioning mechanism 57 is provided below the adjusting rod 55, as shown in FIGS. A positioning mechanism 57 is used to adjust the elevation of the adjusting rod 55 with respect to the carrying case 33 and to position the adjusting rod 55 with respect to the carrying case 33 .

Specifically, as shown in FIGS. 6, 7, and 8, the positioning mechanism 57 includes a positioning portion 58 supported by the carrying case 33 in a state in which the adjusting rod 55 is vertically movably inserted, and a positioning portion. A threaded member 59 attached to the threaded portion of the adjustment rod 55 is provided on both upper and lower sides of 58 .

That is, in the positioning mechanism 57, when the upper screw member 59 is rotated to the tension side, the upper screw member 59 pushes up the adjusting rod 55 with the positioning portion 58 as a reaction force. The position with respect to the carrying case 33 is changed and adjusted to the ascending side. When the lower screw member 59 is rotated toward the loosening side, the lower screw member 59 pulls down the adjusting rod 55 with the positioning portion 58 as a reaction force, and the position of the adjusting rod 55 relative to the carrying case 33 is lowered. Modified to the side. When the upper screw member 59 and the lower screw member 59 are operated to clamp the positioning portion 58 , the adjusting rod 55 is fixed to the positioning portion 58 so as not to move up and down, so that the adjusting rod 55 is positioned with respect to the carrying case 33 . The position of the adjusting rod 55 with respect to the carrying case 33 is held at the adjusted position.

The adjusting rod 55 and the positioning mechanism 57 constitute a position adjusting mechanism 60 capable of changing and adjusting the position of the support shaft 37 with respect to the carrying case 33 in the carrying direction.

In the position adjusting mechanism 60 , when the positioning mechanism 57 is operated to the tension side, the adjusting rod 55 pushes up the connecting body 54 and the connecting body 54 raises the support shaft 37 with respect to the carrying case 33 . Thereby, the endless rotating chain 40 is adjusted to the tight side.

As shown in FIG. 8, the carrying case 33 is provided with an inspection opening 61 through which the tension state of the endless rotating chain 40 can be detected. The inspection port 61 is opened and closed by a detachable cover 62 . The inspection opening 61 is opened in a portion of the transport case 33 located below the positioning mechanism 57 . When adjusting the tension of the endless rotating chain 40 by the position adjusting mechanism 60 , the tension can be adjusted while detecting the tension state of the endless rotating chain 40 through the inspection port 61 .

By inserting a hand into the carrying case 33 through the inspection opening 61 and pushing and pulling the endless rotating chain 40, it is detected whether the tension of the endless rotating chain 40 is loose or not, and the tension of the endless rotating chain 40 is detected. It can be judged whether adjustment is necessary or not. When the tension of the endless rotating chain 40 needs to be adjusted, the tension of the endless rotating chain 40 can be adjusted by the position adjusting mechanism 60 .

That is, the upper screw member 59 is rotated to the tension side. The screw member 59 can be operated while detecting the tension state of the endless rotating chain 40 using the inspection port 61 . When the screw member 59 on the upper side is rotated to the tension side, the adjusting rod 55 is lifted with respect to the carrying case 33 by the screw member 59, and the connecting member 53 is pushed up by the adjusting rod 55, so that the connecting body 54 is attached to the carrying case 33. Both ends of the support shaft 37 are raised by the connecting body 54 . That is, the support shaft 37 is lifted with respect to the carrying case 33 by the left support arm 38 and the right support arm 38 . As a result, the driven sprocket 36 is operated to move to the downstream side in the conveying direction, and the endless rotating chain 40 is operated to be tensioned.

The adjusting rod 55 is prevented from being deformed by the operation reaction force by the first holding member 56 when the connecting body 54 is operated to be raised. Further, the left support arm 38 and the right support arm 38 are raised while being guided by the guide mechanism 50 when the support shaft 37 is operated to be raised. As a result, the support shaft 37 is smoothly raised, and the endless rotating chain 40 is smoothly tensioned. Even if the support shaft 37 is lifted, the transfer surface body portion 42a on the transfer end side follows the support arm 38, and the transfer path 43 is precisely formed to the outer circumference of the driven sprocket 36 whose position has changed.

When the endless rotating chain 40 is tensioned, the positioning portion 58 is clamped by the upper and lower screw members 59 . Then, the adjusting rod 55 is positioned with respect to the carrying case 33 by the positioning mechanism 57, the connecting body 54 is fixed at the raised position, and the endless rotating chain 40 is held in tension.

[Regarding the transport end side part of the supply transport device]
As shown in FIGS. 1, 4, and 8, the conveying terminal end portion 32a of the screw conveyor 32 as the conveying terminal end portion of the supply conveying device 30 is mounted on the rear wall portion 11r of the threshing tank 11 from below the threshing tank 11. is inserted into the threshing tank 11 through the through hole 63 of the . A pair of support frames 29 are connected to the upper portion of the conveying terminal side portion 32 a and the front wall portion 11 f of the grain threshing tank 11 . The pair of support frames 29 are arranged so that the distance between the support frames 29 increases toward the front wall portion 11f. A portion of the conveying terminal side portion 32 a located inside the tank is supported by the threshing tank 11 via a support frame 29 . In this embodiment, a pair of support frames 29 are provided, but the present invention is not limited to this, and may be implemented by providing only one or three or more support frames 29 . An endless belt 67 is wound over a driving pulley 65 of the screw conveyor 32 and a belt pulley 66 supported by the support shaft 37 of the slat conveyor 31 so as not to rotate relative to each other.

In the screw conveyor 32, the power of the slat conveyor 31 is transmitted to the drive pulley 65, and the screw 32b is driven by the drive pulley 65, so that the grain supplied by the slat conveyor 31 is transferred to the threshing tank 11 by the screw 32b. The grains from the slat conveyor 31 are supplied to the threshing tank 11 by conveying them to a high place inside and discharging them into the threshing tank 11 from the discharge port 64 .

[Regarding the composition of the seal]
The through hole 63 of the threshing tank 11 into which the conveying terminal side portion 32a of the screw conveyor 32 is inserted is located near the bottom portion of the rear wall portion 11r of the threshing tank 11 where the lower tapered portion 20 is formed. opened in the wall. A discharge port 64 is opened at the transport end portion of the transport end portion 32a. More specifically, the through-hole 63 is opened in a portion of the rear wall portion 11r of the threshing tank 11, which is inclined forward toward the lower end side.

As shown in FIGS. 8 and 9, a sealing material 68 is interposed between the outer peripheral portion of the through hole 63 and the conveying terminal side portion 32a. The sealing material 68 is made of resin. The sealing member 68 permits relative movement of the conveying terminal side portion 32a in the insertion direction with respect to the through hole 63 due to relative vibration between the threshing device 10 and the threshing tank 11, while the grain inside the threshing tank 11 penetrates. It is configured to prevent leakage from the hole 63 .

Specifically, as shown in FIG. 9, the seal member 68 includes a base portion 68a that abuts against the inner surface of the rear wall portion 11r, and a transport terminal portion that extends from the base portion 68a in the insertion direction of the transport terminal side portion 32a. A sliding contact portion 68b is provided along the outer surface of the terminal end portion 32a and is in sliding contact with the outer surface. The base portion 68a is fastened and fixed to the rear wall portion 11r by mounting screws attached at a plurality of locations in the circumferential direction. As shown in FIGS. 9 and 10, a plurality of rib portions 68c are provided across the base portion 68a and the sliding contact portion 68b. The plurality of rib portions 68c are arranged at intervals in the circumferential direction of the sliding contact portion 68b. As shown in FIG. 10, split points 69 are provided at four points in the circumferential direction of the conveying terminal side portion 32a of the sealing material 68, extending over the base portion 68a and the sliding contact portion 68b. As shown in FIGS. 10 and 11, the sealing member 68 is composed of four split sealing members 68P that are split in the circumferential direction of the conveying end portion 32a. The sealing material 68 can be attached by being divided into four split sealing materials 68P.

[Regarding the configuration of the threshing tank and the threshing discharge device]
As shown in FIGS. 1 and 4, the lower portion of the front wall portion 11f of the threshing tank 11 is inclined rearward toward the lower end side, and the lower portion of the rear wall portion 11r of the threshing tank 11 is inclined toward the lower end side. The bottom of the threshing tank 11 is formed in an inclined state positioned forward, and a downwardly tapered portion 20 extending over the entire width of the bottom is formed. As shown in FIGS. 4 and 12, the lower tapered portion 20 includes a horizontal bottom portion 20a, a front side plate portion rising from the front end of the bottom portion 20a, and a rear side plate rising from the rear end of the bottom portion 20a. A side plate portion is provided. A discharge port 21 is opened at the end of the lower tapered portion 20 on the left lateral side of the threshing tank. A bottom screw 22 is rotatably provided inside the lower tapered portion 20 . A drive pulley 23 is supported by a screw shaft 22a of a bottom screw 22 in a non-rotatable manner outside the lower tapered portion 20 on the right lateral side of the threshing tank.

As shown in FIGS. 2 and 12, a connection case 24 is provided at the left lateral end portion of the bottom of the threshing tank 11 . The grain threshing discharge device 12 extends from the connection case 24 . The threshing discharge device 12 and the bottom screw 22 are connected via a connection case 24 . The grain threshing discharge device 12 and the bottom screw 22 are interlocked and connected inside the connection case 24 so that power can be transmitted from the bottom screw 22 to the grain threshing discharge device 12 .

Specifically, the threshing discharge device 12 is configured by a screw conveyor extending from the connection case 24 . A conveying cylinder of the screw conveyor communicates with the discharge port 21 through the connection case 24 . Inside the connection case 24, the screw shaft of the screw conveyor and the screw shaft 22a of the bottom screw 22 are connected so that the power of the bottom screw 22 is transmitted to the screw conveyor.

The connection case 24 is rotatably supported by the threshing tank 11 . As shown in FIG. 2 , a hydraulic cylinder 25 is connected to the connection case 24 so that the connection case 24 can be rotated by extending and contracting the hydraulic cylinder 25 .

In order to take out the grains from the threshing tank 11, the connection case 24 is rotated by the hydraulic cylinder 25, so that the threshing discharge device 12 is stretched from the stored state along the lateral side of the machine body to the lateral outside of the machine body. Change state to used state.

By switching on the power transmission system that transmits the power of the engine 13 to the driving pulley 23, the driving pulley 23 is driven, the bottom screw 22 is driven, and the power of the bottom screw 22 is transmitted to the grain threshing and discharging device 12. Then, the grain threshing discharge device 12 is driven. When the bottom screw 22 and the threshing discharge device 12 are driven, the grains stored in the threshing tank 11 are discharged into the connection case 24 through the discharge port 21 by the bottom screw 22 . The grain discharged into the connection case 24 is taken over by the threshing discharge device 12 and conveyed by the threshing discharge device 12. ).

As shown in FIG. 12, the lower tapering portion 20 has an inspection opening 26 which is opened in the bottom portion 20a of the lower tapering portion 20 and allows the grains remaining in the lower tapering portion 20 to be taken out, and an inspection opening. A lid 27 for opening and closing the mouth 26 is provided. The lid body 27 is supported by the bottom portion 20a in a state of being opened and closed by vertical rocking with the pivot axis P2 of the hinge member as the rocking fulcrum.

As shown in FIG. 1, a reduction screw conveyor 70 extends from the bottom of the threshing device 10. As shown in FIG. The second processed material obtained by the sorting section of the threshing device 10 is supplied to the reducing screw conveyor 70 by the second screw conveyor 71 (see FIG. 13), and is returned to the oscillating sorting device (not shown) by the reducing screw conveyor 70. be done.

As shown in FIGS. 13 and 14, the return screw conveyor 70 includes a vertically oriented vertical transfer case 70a and a vertical transfer case 70a extending from the lower portion of the vertical transfer case 70a toward the threshing device side and fitted onto the No. 2 screw conveyor 71. As shown in FIGS. , and a connection case 70 b that receives the second processed material from the second screw conveyor 71 . In the connection case 70 b , the case inner space S<b>1 above the second screw conveyor 71 is made wider than the case inner space S<b>2 below the second screw conveyor 71 . Inside the connection case 70b, the second processed material flows upward from the second screw conveyor 71 and is transferred to the reduction screw conveyor 70, but since the space S1 inside the case is wide, the second processed material is not transferred to the reduction screw conveyor 70. smoothly flow toward

[Another embodiment]
(1) In the above-described embodiment, the through hole 63 into which the conveying end portion 32a is inserted is opened in the rear wall portion 11r of the grain threshing tank 11. It may be open.

(2) In the above-described embodiment, an example in which the sealing material 68 including the base portion 68a and the sliding contact portion 68b is employed is shown, but the present invention is not limited to this. A configuration may be adopted in which the base portion 68a is not provided, and is fixed to the grain threshing tank 11 by being adhered to the outer peripheral portion of the through hole 63, and is in sliding contact with the conveying terminal side portion 32a.

(3) In the above-described embodiment, an example in which the supply/conveyor device 30 is configured by the slat conveyor 31 and the screw conveyor 32 is shown, but the present invention is not limited to this. The supply/conveyance device may be composed only of a slat conveyor or a screw conveyor.

(4) In the above-described embodiment, the sealing material 68 is composed of four split sealing materials 68P. You may

The present invention is not limited to front wheels and rear wheels, and can be applied to a combine having a crawler type traveling device or a traveling device in which wheels and mini crawlers are combined.

7 harvesting unit 10 threshing device 11 threshing tank 11r wall (rear wall)
20 Lower narrowed portion 21 Discharge port 22 Bottom screw 29 Support frame 30 Supply conveying device 32a Transfer terminal side portion 63 Through hole 68 Sealing material 68a Base part 68b Sliding contact part 68P Split sealing material

Claims (4)

a threshing device for threshing the crops harvested by the harvesting unit;
a threshing tank that is provided without changing its attitude and stores threshing;
a feeding and conveying device that is provided across the threshing device and the threshing tank, is provided in a continuous state from a starting end to a terminal end, and supplies threshing obtained by the threshing device to the threshing tank; is provided,
a portion of the feeding and conveying device on the terminal end side is inserted into the threshing tank through a through-hole provided in the wall of the threshing tank;
A sealing material is interposed between the outer peripheral portion of the through hole and the transfer terminal side portion,
The seal member is interposed in a state in which relative movement with respect to the through hole in a radial direction is prevented and in a state in which relative movement with respect to the through hole in the inserting direction is allowed. The seal member includes a base portion that abuts on the inner surface of the wall portion, and a sliding contact portion that extends from the base portion along the inserting direction and along the outer peripheral surface of the conveying terminal side portion. A combine according to claim 1. The combine according to claim 1 or 2, wherein the sealing material is composed of a plurality of divided sealing materials that are divided in the circumferential direction of the conveying terminal side portion. The threshing tank has a lower tapered portion formed at the bottom of the threshing tank, a bottom screw provided inside the lower tapered portion for discharging threshed grain from the threshing tank, and the lower tapered portion. a discharge port that is opened in the hitch and enables discharge of the grain threshing by the bottom screw,
The through-hole is opened in a wall portion near the bottom of the wall,
4. The combine according to any one of claims 1 to 3, further comprising a support frame connected to an upper end side portion of the conveying terminal side portion and the inside of the grain threshing tank and supporting the upper end side portion.

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