CN113261433A

CN113261433A - Threshing cylinder

Info

Publication number: CN113261433A
Application number: CN202110532892.XA
Authority: CN
Inventors: 佐村木仁; 正野润一; 中畠章博; 乙仓进; 北冈治正
Original assignee: Yanmar Power Technology Co Ltd
Current assignee: Yanmar Power Technology Co Ltd
Priority date: 2016-03-30
Filing date: 2017-02-23
Publication date: 2021-08-17
Also published as: JP2017176035A; CN108882680B; CN108882680A; JP6608751B2; WO2017169358A1

Abstract

In the threshing cylinder according to the present invention, a plurality of threshing teeth frames are detachably fixed to a front side plate and a rear side plate fixed to a shaft of the threshing cylinder with the divided shielding plates being wound around the front side plate and the rear side plate. The number of the threshing teeth frames is larger than the number of the divided shielding plates, and a plurality of threshing teeth frames are arranged on the outer surfaces of the plurality of divided shielding plates.

Description

Threshing cylinder

The application is a divisional application of an invention patent application with the application number of 201780014538.X (the international application number of PCT/JP2017/006798) and the application date of 2017, 2 and 23, and the invention name of a threshing cylinder.

Technical Field

The invention relates to a threshing cylinder for threshing cut and taken ear stalks supplied to a threshing chamber.

Background

As a threshing cylinder for threshing cut stalks supplied to a threshing chamber, there is proposed a threshing cylinder including: a front side plate and a rear side plate which are fixedly connected with the front part and the rear part of the threshing cylinder shaft; a plurality of support rods supported by the front side plate and the rear side plate so as to be arranged along a circumferential direction of the threshing cylinder shaft; and a plurality of threshing teeth provided to the plurality of support bars so as to extend radially outward (see, for example, patent documents 1 to 10 below).

In the threshing cylinder, the cut ear stalks freely enter the internal space of the threshing cylinder main body formed by the front side plate, the rear side plate, and the plurality of support rods, so the cut ear stalks are likely to be wound around the threshing cylinder shaft and the support rods, and there is a possibility that the threshing efficiency is deteriorated.

Patent documents 1 to 5 disclose the following: a hollow pipe member is used as the support rod; and penetrating the mounting hole in a width direction orthogonal to a longitudinal direction of the hollow pipe member, and fixing the threshing teeth to the hollow pipe member at 2 positions on the inner side and the outer side in the radial direction in a state where the threshing teeth are inserted into the mounting hole and the threshing teeth are extended outward in the radial direction with respect to the threshing cylinder shaft.

As for the threshing cylinders described in patent documents 1 to 10, patent document 11 below discloses a threshing cylinder including: a front side plate and a rear side plate which are fixedly connected with the front part and the rear part of the threshing cylinder shaft; a plurality of support rods supported by the front side plate and the rear side plate so as to be arranged along a circumferential direction of the threshing cylinder shaft; and a plurality of threshing teeth provided on the plurality of support bars so as to extend radially outward, wherein the threshing cylinder includes a shield plate that covers at least a part of the space between the adjacent support bars, and the shield plate is located radially inward of a virtual outer surface connecting the outer peripheral surfaces of the adjacent support bars.

The threshing cylinder described in patent document 11 has an advantage that it can obtain a threshing action by a plurality of threshing teeth supported by the support rod, and can effectively prevent the ear stalks from entering the internal space of the threshing cylinder main body due to the presence of the shielding plate, and further, can expand the processing space between the shielding plate and the inner surface of the threshing chamber as much as possible due to the shielding plate being located radially inward of the virtual outer surface.

However, the threshing cylinder described in patent document 11 still has room for improvement in terms of maintenance and/or replacement of the threshing teeth.

Since a large load is applied to the threshing teeth during the threshing process, there is a possibility that maintenance and/or replacement of the threshing teeth may be required.

In the threshing apparatus described in patent document 11, the front side plate, the rear side plate, and the support rod form a frame body (threshing cylinder main body), and the shielding plate is detachably connected to the frame body.

That is, in the structure described in patent document 11, the support rod itself forms a threshing cylinder main body, and the removal of the support rod becomes a very troublesome work.

Further, although patent document 2 discloses that the shielding plate covers the space between the adjacent support rods to prevent the cutting stalks from entering the threshing cylinder main body, in the structure described in patent document 2, the shielding plate is welded and fixed to the support rods, and therefore, the maintenance and/or replacement work of the support rods becomes more complicated.

Patent document

Patent document 1: japanese patent No. 4148978

Patent document 2: chinese utility model No. ZL96204624.8 specification

Patent document 3: chinese utility model No. ZL200320110474.9 specification

Patent document 4: chinese utility model No. ZL200320111091.3 specification

Patent document 5: specification of Chinese utility model No. ZL200720018949.X

Patent document 6: chinese utility model No. ZL96201207.6 specification

Patent document 7: chinese utility model No. ZL01234314.5 specification

Patent document 8: chinese utility model No. ZL02240781.2 specification

Patent document 9: chinese utility model No. ZL200420041319.0 specification

Patent document 10: specification of Chinese utility model No. ZL200420051275.X

Patent document 11: japanese patent No. 5437117

Disclosure of Invention

In view of the above-described conventional techniques, an object of the present invention is to provide a threshing cylinder in which a plurality of threshing teeth frames are arranged around an axis of a threshing cylinder shaft, and the threshing teeth frames have a support rod and a plurality of threshing teeth fixed to the support rod, so that the intrusion of cut stalks into an internal space can be effectively prevented, and the threshing teeth frames can be easily maintained and/or replaced.

In order to achieve the above object, a first aspect of the present invention provides a threshing cylinder including: the front side plate and the rear side plate are fixedly connected with the threshing cylinder shaft; a shielding plate wound around the front and rear side plates so as to form an internal space covering the periphery of the threshing cylinder shaft in cooperation with the front and rear side plates; and a plurality of threshing teeth frames each including an elongated support bar and a plurality of threshing teeth arranged with a gap therebetween in a longitudinal direction of the support bar, wherein the shielding plate has a plurality of divided shielding plates divided in a circumferential direction of the threshing cylinder shaft, and the plurality of threshing teeth frames are detachably fixed to the front side plate and the rear side plate with the shielding plates interposed therebetween in the following postures: the support rods of the threshing teeth frames are arranged in a state of being substantially parallel to the threshing cylinder shaft at intervals in the circumferential direction of the threshing cylinder shaft, the threshing teeth extend outward in the radial direction, the number of the threshing teeth frames is larger than that of the divided shielding plates, and the threshing teeth frames are arranged on the outer surfaces of the divided shielding plates.

According to the threshing cylinder of the first aspect of the present invention, since the plurality of threshing teeth frames arranged in the circumferential direction are detachably and fixedly connected to the front side plate and the rear side plate with the divided shielding plates interposed therebetween in a state where the plurality of divided shielding plates divided in the circumferential direction are wound around the front side plate and the rear side plate fixedly connected to the shaft of the threshing cylinder, the number of threshing teeth frames is larger than the number of divided shielding plates, and the plurality of threshing teeth frames are arranged on the outer surfaces of the plurality of divided shielding plates, it is possible to effectively prevent cut ear stalks from entering the internal space of the threshing cylinder, and it is possible to detach only one threshing teeth frame including worn and/or damaged threshing teeth from the threshing cylinder. Therefore, maintenance and/or replacement of the threshing teeth frame having the threshing teeth that are easily worn and/or damaged can be easily performed.

In order to achieve the above object, a second aspect of the present invention provides a threshing cylinder including: the front side plate and the rear side plate are fixedly connected with the threshing cylinder shaft; a shielding plate wound around the front and rear side plates so as to form an internal space covering the periphery of the threshing cylinder shaft in cooperation with the front and rear side plates; and a plurality of threshing teeth frames each including an elongated support bar and a plurality of threshing teeth arranged with a gap therebetween along a longitudinal direction of the support bar, wherein the front side plate has a front side radial extending portion fixedly connected to the threshing cylinder shaft and a front side circumferential extending portion extending in a circumferential direction of the threshing cylinder shaft, the rear side plate has a rear side radial extending portion fixedly connected to the threshing cylinder shaft in a manner opposed to the front side radial extending portion and a rear side circumferential extending portion extending in the circumferential direction of the threshing cylinder shaft, the shielding plate has a plurality of divided shielding plates divided in the circumferential direction of the threshing cylinder shaft and is wound around the front side circumferential extending portion and the rear side circumferential extending portion, and the support bar has: a long rod body to which the plurality of threshing teeth are fixedly connected; and a plurality of attachment brackets that are fixed to the rod main body so as to be spaced apart from each other in the longitudinal direction of the rod main body, wherein the front-side circumferentially extending portion, the rear-side circumferentially extending portion, and the shielding plate are formed in a polygonal shape such that a plurality of flat surfaces facing radially outward are arranged in the circumferential direction of the threshing cylinder shaft when viewed in the axial direction of the threshing cylinder shaft, and wherein the plurality of threshing teeth frames are fixed detachably to corresponding flat surfaces of the front-side circumferentially extending portion and the rear-side circumferentially extending portion via the shielding plate in a state where the rod main body is positioned on the flat surface of the shielding plate.

According to the threshing cylinder of the second aspect of the present invention, when viewed in the axial direction of the threshing cylinder shaft, the circumferential extension portions of the front side plate and the rear side plate that are fixedly connected to the threshing cylinder shaft, and the plurality of divided shielding plates that are wound around the circumferential extension portions are formed in a polygonal shape such that a plurality of flat surfaces facing radially outward are arranged in the circumferential direction of the threshing cylinder shaft, and a plurality of threshing teeth frames arranged in the circumferential direction are detachably fixed to corresponding flat surfaces of the circumferential extension portions of the front side plate and the rear side plate via the shielding plates in a state where the long rod main body of the threshing teeth frame is positioned on the flat surface of the shielding plate, so that it is possible to effectively prevent the cutting stalks from entering the internal space of the threshing cylinder, and to effectively prevent the cutting stalks from being caught in the gap between the rod main body and the shielding plates, only one threshing teeth frame containing the worn and/or damaged threshing teeth can be detached from the threshing cylinder. Therefore, maintenance and/or replacement of the threshing teeth frame having the threshing teeth that are easily worn and/or damaged can be easily performed.

Preferably, the number of the front-side circumferential extension portion, the rear-side circumferential extension portion, and the flat surface of the shielding plate is 2 times the number of the plurality of threshing teeth frames.

In this case, one threshing teeth frame is located on one flat surface of the shielding plate, and the next threshing teeth frame adjacent to the one threshing teeth frame on one circumferential side of the threshing cylinder shaft is located on the second flat surface adjacent to the one flat surface on one circumferential side of the threshing cylinder shaft.

Preferably, the threshing cylinder according to the present invention may further include: a first middle plate fixedly connected to the threshing cylinder between the front side plate and the rear side plate; and a second intermediate plate fixedly connected to the threshing cylinder between the first intermediate plate and the rear side plate.

The first middle plate and the second middle plate are provided with middle radial extension parts fixedly connected with the threshing cylinder shaft and middle circumferential extension parts extending along the circumferential direction of the threshing cylinder shaft.

In this case, the plurality of threshing teeth frames disposed on the outer surfaces of the plurality of divided shielding plates are detachably fixed to the intermediate circumferential extending portions of the first intermediate plate and the second intermediate plate by fastening members in a state where the divided shielding plates are sandwiched between the mounting bracket and the intermediate circumferential extending portions.

Drawings

Fig. 1 is a left side view of a combine harvester to which a threshing cylinder according to an embodiment of the present invention can be applied.

Fig. 2 is a right side view of the combine harvester.

Fig. 3 is a top view of the combine.

Fig. 4 is a schematic transmission diagram of the combine harvester.

Fig. 5 is a side view of the threshing cylinder.

Fig. 6 is a perspective view of the threshing cylinder.

Fig. 7 is a sectional view taken along line VII-VII in fig. 5.

Fig. 8 is a sectional view taken along line VIII-VIII in fig. 5.

Fig. 9 is a sectional view taken along line IX-IX in fig. 5.

Fig. 10 is an exploded perspective view of the threshing cylinder, which shows a state viewed from the front.

Fig. 11 is an exploded perspective view of the threshing cylinder, which shows a state viewed from the rear.

Fig. 12 is a perspective view of a threshing teeth frame provided in the threshing cylinder.

Fig. 13 is a sectional view taken along line XIII-XIII in fig. 5.

Detailed Description

Preferred embodiments of the threshing cylinder according to the present invention will be described below with reference to the accompanying drawings.

First, a description will be given of a combine harvester 1 to which the threshing cylinder 600 according to the present embodiment is applied.

Fig. 1 to 4 show a left side view, a right side view, a top view and a transmission diagram of the combine harvester 1, respectively.

As shown in fig. 1 to 4, the combine harvester 1 includes: a traveling machine body 10; a pair of left and right crawler belts 20 coupled to the traveling machine body 10; an engine 25 mounted on the traveling machine body 10; a transmission 30 interposed and mounted in a transmission path from the engine 25 to the traveling crawler 20; an operator control unit 40 mounted on the traveling machine body 10; a cutting part 100 connected to the front of the traveling machine body 10; a threshing device 200 for threshing the cut ear stalks cut by the cutting unit 100; and a grain tank 50 that stores grains generated by the threshing device 200.

As shown in fig. 1 to 3, the steering unit 40 is disposed in the front portion of the traveling machine body 10 and on one side in the machine body width direction.

In the present embodiment, the one side and the other side in the machine width direction mean the right side and the left side, respectively, when facing the forward direction of the combine harvester 1.

The driver unit 40 includes: a driver seat 41 on which an operator can sit; and various operation members disposed in the vicinity of the driver seat 41.

The operation member includes: a steering operation member 42 that changes the traveling direction of the combine harvester 1; a main speed change operation member 43 and a sub speed change operation member 44 that change the traveling speed of the combine harvester 1; a threshing clutch operating member 45 that switches between driving and stopping of the threshing device 200; and a clutch operating member 46 for switching between driving and stopping of the harvesting device 100.

As shown in fig. 1 to 3, the engine 25 is supported by the traveling machine body 10 by a space below the cab 40.

The engine 25 has: an engine main body 26 supported by the traveling machine body 10 in a space below the cab 40; a first output shaft 27a extending from the engine main body 26 to the other side in the machine width direction; and second and

third output shafts

27b, 27c extending from the engine body 26 to one side in the machine width direction.

The transmission 30 is configured to: the rotational power actively input from the engine 25 is shifted and output to the pair of traveling crawlers 20.

As shown in fig. 1 and 3, the transmission 30 is disposed below the driver's part 40 in a position forward of the engine 25.

In detail, the transmission 30 includes: a transmission case 31 supported by the traveling machine body 10; a transmission input shaft 32 extending from the transmission case 31 to the other side in the width direction of the machine body; and a speed change mechanism that changes the speed of the rotational power input via the transmission input shaft 32.

As shown in fig. 4, in the present embodiment, the transmission 30 includes, as the transmission mechanism: a main transmission device 35 (see fig. 4) such as a hydraulic continuously variable transmission device (HST) that performs a continuously variable transmission in response to an operation of the main shift operation member 43; and a sub-transmission device (not shown) such as a gear type transmission device to which rotational power is actively input from the main transmission device 35, and which performs multi-stage transmission in response to an operation of the sub-transmission operation member 44.

In the present embodiment, the pump shaft of the HST35 functions as the transmission input shaft 32.

The harvesting device 100 is coupled to the traveling machine body 10 so as to be able to ascend and descend, and the height of the harvesting device 100 can be adjusted by an ascending and descending hydraulic cylinder device 60 (see fig. 1).

The hydraulic oil is supplied to the hydraulic cylinder device for lift 60 from a hydraulic pump 28 (see fig. 4) provided in addition to the engine 25.

The harvesting device 100 includes: a feed chamber 110 that defines a conveying path for conveying the cut ear stalks toward a threshing opening provided at the front of a threshing chamber 201 of the threshing device 200; a supply conveyor 115 disposed in the supply chamber 110; a horizontally long bucket-shaped grain header 120 connected to a front end of the supply chamber 110; a raking auger 125 arranged in the grain header 120; a raking and stalk-pulling wheel 130 with a tooth-raking beam, which is arranged in front of and above the raking auger 125; and a cutting knife 140 disposed in front of and below the raking auger 125.

The supply conveyor 115 includes: a cutting input shaft 116 arranged at a conveyance direction end side (rear side) in the machine width direction; a cutting driven shaft 117 arranged on the conveyance direction start end side (front) in the machine width direction; a drive-side rotating body 118a supported by the harvesting input shaft 116 so as to be relatively non-rotatable; a driven-side rolling body 118b supported by the harvesting driven shaft 117; and a conveying body 118c wound around the driving-side rolling body 118a and the driven-side rolling body 118 b.

In the above configuration, the hydraulic cylinder device 60 for elevation (see fig. 1) is inserted and attached between the lower surface of the supply chamber 110 and the travel machine body 10, and the harvesting device 100 can be elevated around the harvesting input shaft 116 by the hydraulic cylinder device 60 for elevation.

As shown in fig. 1 to 3, in the present embodiment, the harvesting device 100 further includes a pair of left and right seedling separators 150 extending forward from both sides in the machine width direction of the grain header 120.

According to the structure, for the ear stalks which are not cut between the left and right pair of the seedling dividing bodies 150, the ear tip side is raked by the raking and seedling pulling wheel 130, and the stalk side is cut by the cutting knife 140.

The ear stalks cut by the cutting knife 140 are gathered near the front end opening of the supply chamber 110 in the grain header 120 by the raking auger 125, are conveyed from the front end opening of the supply chamber 110 toward the rear end opening by the supply conveyor 115, and are thrown into the threshing chamber 201 from the threshing opening.

As shown in fig. 1 and 4, the combine harvester 1 according to the present embodiment includes a front roller mechanism 160, and the front roller mechanism 160 feeds the ear stalks fed from the feeding conveyor 115 to the threshing opening of the threshing chamber 201.

The front roller mechanism 160 includes: a front drum drive shaft 161 extending in the machine body width direction between the conveying end of the supply conveyor 115 and the threshing opening; and a front roller (feed wheel) 162 supported by the front roller drive shaft 161 so as not to rotate relative thereto, the front roller 162 being configured to throw the ear stalks fed to the feed end of the feed conveyor 115 into the threshing chamber 201 from the threshing opening.

As shown in fig. 1, 4, and the like, the threshing device 200 includes: the threshing chamber 201 formed by a machine frame erected on the traveling machine body 10; a threshing cylinder shaft 210 arranged in the front-rear direction; a threshing cylinder 600 according to the present embodiment, which is housed in the threshing chamber 201 in a state of being driven to rotate by the threshing cylinder shaft 210; and a receiving net 230 (see fig. 1) disposed below the threshing cylinder 220.

Details of the threshing cylinder 600 will be described later.

Among the threshed objects obtained by threshing the cut ear stalks by the threshing cylinder 600, threshed objects such as grains smaller than the openings of the meshes of the receiving net 230 leak downward from the receiving net 230, and are subjected to a screening process by a screening mechanism 250 of the threshing device 200 described below.

On the other hand, the threshed objects such as straw chips larger than the mesh openings of the receiving net 230 are discharged from the dust discharge port 205 provided behind the threshing chamber 201 by the conveying action of the threshing cylinder 220.

Preferably, a plurality of dust feed valves (not shown) whose installation angles can be changed are provided above the threshing cylinder 220, and the conveying speed of the threshed objects in the threshing chamber 201 can be adjusted by changing the installation angles of the dust feed valves.

The threshing device 200 further includes the grain screening mechanism 250 that screens grains from the threshed material that leaks downward from the receiving net 230.

The grain screening mechanism 250 has: a swing screen 260 for screening the specific gravity of the degranulated material that has leaked downward from the receiving net 230; and a screen air supply body 280 that supplies screen air toward the swinging screen body 260.

The oscillating screen 260 has: an oscillating screen drive shaft 261 that is driven by power that is actively transmitted from the engine 25; and a swinging screen disk 265, the swinging screen disk 265 being swung by the swinging screen drive shaft 261.

The oscillating sifting tray 265 includes a grain tray, a coarse sifter, a grain sifter, a straw shaker, etc.

The screen air supply body 280 has: a grain pump shaft 281 for driving the grain pump shaft 281 by power actively transmitted from the engine 25; and a winnowing fan 285 for driving the winnowing fan 285 by using the winnowing machine shaft 281.

The grain screening mechanism 250 further has: an first-class guide groove 301 in which grains (first-class products such as fine grains) screened from the degranulated material by the specific gravity screening action of the oscillating screen 260 and the wind screening action of the screening wind supplier 280 are collected; a first-class product conveying mechanism 310 disposed in the first-class product guide groove 301; a winnowing conveying mechanism 320 for conveying the first-class product conveyed by the first-class product conveying mechanism 310 into the grain box 50; a second-grade channel 302, in which the mixture of grains and straw (second-grade) from the threshing material is collected; a second-grade product conveying mechanism 330 disposed in the second-grade product guide groove 302; and a second-product returning and conveying mechanism 340 that returns the second product conveyed by the second-product conveyor mechanism 330 to the side of the swing screen tray 265 at the screen start end.

Here, a transmission structure of the combine harvester 1 will be explained.

As shown in fig. 4, the second and

third output shafts

27b, 27c of the engine 25 drive the hydraulic pump 28 and the cooling fan 29, respectively.

On the other hand, the first output shaft 27a of the engine 25 outputs a traveling system rotational power for driving the traveling member 20.

As shown in fig. 4, the first output shaft 27a is actively coupled to the transmission input shaft 32 via a travel system annular body transmission mechanism 400 such as a pulley transmission mechanism.

The first output shaft 27a further outputs a working system rotational power for driving the threshing device 200 and the harvesting device 100.

In the present embodiment, the rotational power of the working system is transmitted to the threshing device 200 and the harvesting device 100 via the pipe shaft 500 that is relatively rotatably inserted into one side of the winnowing machine shaft 281 in the machine width direction.

That is, as shown in fig. 4, the winnowing machine shaft 281 is supported by a machine frame forming the threshing chamber 201 so as to be rotatable around an axis, and the pipe shaft 500 is relatively rotatably inserted in a portion of the winnowing machine shaft 281 (the machine frame width direction side of the winnowing machine shaft 281) extending to one side in the machine width direction than the machine frame forming the threshing chamber 201.

In the above configuration, the first output shaft 27a is actively coupled to the pipe shaft 500 via a first operation system annular body transmission mechanism 410 such as a pulley transmission mechanism.

As shown in fig. 4, a threshing clutch 290 is inserted into the first work system endless transmission mechanism 410, and the threshing clutch 290 transmits or blocks power from the engine 25 to the threshing device 200 and the harvesting device 100 in response to the operation of the threshing clutch operating member 45.

In the combine harvester 1, as shown in fig. 4, a threshing cylinder input shaft 510 is provided in front of the threshing chamber 201 along the width direction of the machine body.

As shown in fig. 4, 5, and 7, the threshing cylinder input shaft 510 is supported rotatably about an axis line by a transmission case 520 disposed in front of the threshing chamber 201.

Specifically, the threshing cylinder input shaft 510 is supported by the transmission case 520 so as to be rotatable about the axis line in the following state: one side in the machine width direction extends outward from the transmission case 520 and is positioned in the gap between the cab 40 and the threshing device 200 in the machine width direction, and the other side in the machine width direction protrudes into the transmission case 520.

In the above configuration, the pipe shaft 500 is actively coupled to the threshing cylinder input shaft 510 via a second operation system annular body transmission mechanism 420 such as a pulley transmission mechanism.

As shown in fig. 4, the front end of the threshing cylinder shaft 210 protrudes into the transmission case 520, and is actively coupled to the threshing cylinder input shaft 510 in the transmission case 520.

Specifically, as shown in fig. 4, the other side of the threshing cylinder input shaft 510 in the machine width direction ends in the transmission case 520, and the threshing cylinder input shaft is actively connected to the tip end of the threshing cylinder shaft 210 via a bevel gear mechanism 530 in the transmission case.

The combine harvester 1 is provided with a working system transmission shaft 540, one side of the working system transmission shaft 540 in the machine width direction extends in the machine width direction in the transmission case 520 in a state of being connected to the other side of the threshing cylinder input shaft 510 in the machine width direction so as not to be relatively rotatable about the axis, and the rotational power from the engine 25 is transmitted to the harvesting device 100 and the screening mechanism 250 through the working system transmission shaft 540.

In the present embodiment, the work system transmission shaft 540 is coupled to the threshing cylinder input shaft 510 so as to be relatively non-rotatable about the axis by the bevel gear mechanism 530.

That is, the driving-side bevel gear of the bevel gear mechanism 530 is provided with a spline hole into which the other side in the machine width direction of the threshing cylinder input shaft 510 is inserted so as to be incapable of relative rotation, and the one side in the machine width direction of the work system transmission shaft 540 is inserted into the spline hole of the driving-side bevel gear so that the work system transmission shaft 540 is coupled to the threshing cylinder input shaft 510 so as to be incapable of relative rotation about the axis.

Next, a transmission structure for transmitting power from the work system transmission shaft 540 to the harvesting device 100 will be described.

As described above, the combine harvester 1 includes the front drum mechanism 160, and transmits power from the work system drive shaft 540 to the harvesting device 100 via the front drum drive shaft 161.

The working system transmission shaft 540 is actively coupled to the front drum drive shaft 161 via a third working system annular body transmission mechanism 430 such as a pulley transmission mechanism.

As shown in fig. 4, a disconnect clutch 190 is inserted into the third operation system annular body transmission mechanism 430, and the disconnect clutch 190 transmits or blocks power transmission in accordance with an operation of the disconnect clutch operating member 46.

The front drum drive shaft 161 is actively coupled to the harvesting input shaft 116 via a fourth operation system annular body transmission mechanism 440 such as a sprocket transmission mechanism.

In the present embodiment, as shown in fig. 4, a forward/reverse rotation switching mechanism 170 is interposed between the front drum drive shaft 161 and the harvesting input shaft 116, and the fourth work system ring transmission mechanism 440 transmits rotational power from the front drum drive shaft 161 to the forward/reverse rotation switching mechanism 170.

More specifically, a cutting drive shaft 105 is disposed on the other side of the cutting input shaft 116 in the machine width direction and coaxially with the cutting input shaft 116, and the front drum drive shaft 161 is actively connected to the cutting drive shaft 105 via the fourth power train transmission mechanism 455.

The forward/reverse switching mechanism 170 is interposed between the harvesting drive shaft 105 and the harvesting input shaft 116.

The grain header 120 is provided with: a header drive shaft 121 along the machine body width direction; and a raking shaft 122 which is movably connected to the header drive shaft 121 through a header drive chain 460 along the machine width direction in a state of supporting the raking auger 125, wherein the header drive shaft 121 is movably connected to the raking shaft 122 through a raking drive chain 461.

The raking shaft 122 is movably connected to a reel shaft 131 supporting the raking reel 130.

In detail, the raking shaft 122 is actively connected to an intermediate shaft 466 through a first reel wheel driving chain 465, and the intermediate shaft 466 is actively connected to the reel shaft 131 through a second reel wheel driving chain 467.

The header drive shaft 121 is also actively coupled to the cutter 140 via a cutter drive crank mechanism 470.

Next, a transmission structure for transmitting power from the work system transmission shaft 540 to the screening mechanism 250 will be described.

As shown in fig. 4, the work system drive shaft 540 is also actively connected to the winnower shaft 281 via a fifth work system ring transmission mechanism 450 such as a pulley transmission mechanism.

In the present embodiment, as shown in fig. 4, the first-class product conveying mechanism 310, the grain conveying mechanism 320, the second-class product conveying mechanism 330, the second-class product returning conveyor mechanism 340, and the swing screen shaft 261 are actively driven by the rotational power via the grain motor shaft 281.

Specifically, as shown in fig. 4, the first-class product conveying mechanism 310 includes: a first-class product conveyor shaft 311 disposed in the first-class product guide groove 301; and a first-class product conveyor 312 disposed on the first-class product conveyor shaft 311.

The winnowing conveying mechanism 320 has: a grain raising shaft 321 disposed in the grain raising drum 325, a lower end side of the grain raising drum 325 communicating with one side of the first-class product guide groove 301 in the width direction of the machine body, an upper end side communicating with the inlet of the grain tank 50, and a lower end side of the grain raising shaft 321 movably connected to the first-class product conveyor shaft 311; and a winnowing conveyor 322 disposed on the winnowing shaft 321.

The second-grade product conveyor mechanism 330 includes: a second-grade conveyer shaft 321 disposed in the second-grade guide groove 302; and a second-class product conveyor 322 provided on the second-class product conveyor shaft 321.

The second-grade product return conveyor mechanism 340 includes: a second-grade return shaft 341 arranged in the second-grade return cylinder 345, a lower end side of the second-grade return cylinder 345 communicating with one side of the second-grade guide groove 302 in the machine width direction and an upper end side opening toward the screening start end side of the swing screening tray 265, and a lower end side of the second-grade return shaft 341 actively connected to the second-grade conveyor shaft 321; and a second-grade product returning conveyor 342 provided to the second-grade product returning shaft 341.

In the above configuration, the other side in the machine width direction of the winnowing machine shaft 281 is actively connected to the other side in the machine width direction of the first-class conveyer shaft 311 and the second-class conveyer shaft 321 via the conveyer pulley transmission mechanism 480.

The other side in the machine width direction of the second-stage conveyer shaft 321 is actively connected to the other side in the machine width direction of the swing sifting shaft 261 via a swing sifting pulley transmission mechanism 485.

The following describes a detailed structure of the threshing cylinder 600 according to the present embodiment.

Fig. 5 and 6 show a side view and a perspective view of the threshing cylinder 600, respectively.

Fig. 7 to 9 show sectional views along lines VII-VII, VIII-VIII, and IX-IX in fig. 5, respectively.

Fig. 10 and 11 are exploded perspective views of the threshing cylinder 600.

As shown in fig. 10, 11, and the like, the threshing cylinder 600 includes: a front side plate 620 and a rear side plate 630, which are fixedly connected to the threshing cylinder shaft 210; a shielding plate 650 wound around the front side plate 620 and the rear side plate 630; and a plurality of threshing teeth frames 700 detachably fixed to the outer surface of the shielding plate 650.

As shown in fig. 10 and 11, the front plate 620 includes: a front radial extension 621 supported by the threshing cylinder shaft 210 so as not to rotate relative thereto; and a front-side circumferential extension 625 extending in the circumferential direction of the threshing cylinder shaft 210.

In the present embodiment, the front-side circumferential extension 625 is fixed to the rear surface of the front-side radial extension 621 by welding or the like.

As shown in fig. 10 and 11, the rear panel 630 includes: a rear radial extension 631 fixed to the threshing cylinder shaft 210 so as to face the front radial extension 621; and a rear-side circumferential extension 635 that extends in the circumferential direction of the threshing cylinder shaft 210.

In the present embodiment, the rear-side circumferential extension 635 is fixed to the front surface of the rear-side radial extension 621 by welding or the like.

The shielding plate 650 is wound around the front side plate 620 and the rear side plate 630 so as to form an internal space covering the periphery of the threshing cylinder shaft 210 in cooperation with the front side plate 620 and the rear side plate 630.

As shown in fig. 8 to 11, the shielding plate 650 has a plurality of divided shielding plates divided in the circumferential direction of the threshing cylinder shaft 210.

In the present embodiment, the shielding plate 650 includes a first shielding plate and a second shielding plate 650(1), 650(2) which are divided into approximately 2 parts in the circumferential direction of the threshing cylinder shaft 210.

The threshing teeth frame 700 has: an elongated support rod 710; and a plurality of threshing teeth 730 arranged with a gap in the longitudinal direction of the support bar 710.

As shown in fig. 5 to 11, the threshing teeth frames 700 are detachably fixed to the front side plate 620 and the rear side plate 630 with the shielding plate 650 interposed therebetween in the following postures: the support bars 710 of the threshing teeth frames 700 are arranged substantially parallel to the threshing cylinder shaft 210 at intervals in the circumferential direction of the threshing cylinder shaft 210, and the threshing teeth 730 extend radially outward.

An enlarged perspective view of the threshing teeth frame 700 is shown in fig. 12.

As shown in fig. 10 to 12, etc., the support rod 710 includes: an elongated rod main body 711 to which the plurality of threshing teeth 730 are fixed; and a plurality of mounting brackets 715 provided to the lever main body 711 so as to be separated from each other in the longitudinal direction of the lever main body 711.

In the present embodiment, as shown in fig. 12, the rod main body 711 is formed as a hollow square tube.

That is, the lever main body 711 includes: bottom and

upper walls

711a, 711b which are respectively located radially inside and outside the threshing cylinder shaft 210 in a state of being fitted to the threshing cylinder 600; and first and

second side walls

711c and 711d which are respectively located on one side and the other side in the circumferential direction of the threshing cylinder shaft 210.

The attachment bracket 715 has a front attachment bracket 715F and a rear attachment bracket 715R, and the front attachment bracket 715F and the rear attachment bracket 715R are provided at the same positions as the front side plate 620 and the rear side plate 630, respectively, in the axial direction of the threshing cylinder shaft 210.

The front mounting bracket 715F and the rear mounting bracket 715R each have: first and

second attachment pieces

715a and 715b extending to one side and the other side in the width direction of the lever main body 711 with the bottom wall 711a of the lever main body 711 interposed therebetween; a first coupling piece 715c that couples the first side wall 711c of the lever main body 711 and the first mounting piece; and a second coupling piece 715d that couples the second side wall of the lever main body 711 and the second attachment piece 715 b.

A cross-sectional view along line XIII-XIII in fig. 5 is shown in fig. 13.

As shown in fig. 13, the plurality of threshing teeth 730 are fixed to the bottom wall 711a and the upper wall 711b of the lever main body 711 by welding or the like in the following state: the lower end portion extends from the bottom wall 711a of the lever main body 711 to the inside in the radial direction of the threshing cylinder shaft 210, and the upper end portion extends from the upper wall 711b of the lever main body 711 to the outside in the radial direction of the threshing cylinder shaft 210.

As shown in fig. 13, the attachment bracket 715 is configured such that a gap 765 is provided between the bottom wall 711a of the lever main body 711 and the shield plate 650 so that the lower end of the threshing teeth 730 does not interfere with the shield plate 650, and the lever main body 711 can be disposed on the shield plate 650.

Fig. 13 shows a second intermediate mounting bracket 715C (2) described below, which is optionally provided in the threshing cylinder 600 according to the present embodiment.

The second intermediate mounting bracket 715C (2) and a first intermediate mounting bracket 715C (1) described below have the same configurations as the front side mounting bracket 715F and the rear side mounting bracket 715R.

In the present embodiment, the threshing teeth frame 700 is disposed on the outer surface of the shielding plate 650, the shielding plate 650 is wound around the front mounting bracket 620 and the rear mounting bracket 630, and the threshing teeth frame 700 is detachably fixed to the front plate 620 and the rear plate 630 with the shielding plate 650 interposed therebetween.

Specifically, the first and

second attachment pieces

715a and 715b of the attachment bracket 715 are formed with attachment holes 717 through which fastening members 720 such as bolts are inserted (see fig. 12).

In the plurality of divided shielding plates 650(1), 650(2) constituting the shielding plate 650, through holes 652 (see fig. 10 and 11) are formed at positions facing the mounting holes 717 of the corresponding mounting bracket 715 in a state of being wound around the front-side circumferential extending portion 625 and the rear-side circumferential extending portion 635.

Further, a fitting hole 627 is formed in the front side circumferential extending portion 625 and the rear side circumferential extending portion 635 at a position corresponding to the mounting hole 717 of the mounting bracket 715.

In the above-described configuration, the plurality of threshing teeth frames 700 arranged on the outer surfaces of the plurality of divided shielding plates 650(1), 650(2) in a state where the plurality of divided shielding plates 650(1), 650(2) are wound around the front-side circumferential extending portion 625 and the rear-side circumferential extending portion 635 are detachably fixed to the front-side circumferential extending portion 625 and the rear-side circumferential extending portion 635 via the fastening members 720 inserted through the mounting holes 717 of the mounting bracket 715, the through holes 652 of the shielding plates 650, the mounting holes 627 of the front side plate 620, and the mounting holes 627 of the rear side plate 630, with the plurality of divided shielding plates 650(1), 650(2) interposed therebetween.

Here, as shown in fig. 7 to 11, the number of the threshing teeth frames 700 provided in the threshing cylinder 600 is larger than the number of the divided shielding plates 650(1), (650), (2) so that a plurality of the threshing teeth frames 700 are present on the outer surfaces of the divided shielding plates 650(1), (650), (2), respectively.

As described above, in the present embodiment, the shield plate 650 includes 2 divided shield plates of the first and second divided shield plates 650(1), (650), (2), and 6 threshing teeth frames 700 are provided.

In this case, 3 threshing teeth frames 700 are disposed on the outer surface of each of the divided shielding plates 650(1), 650 (2).

According to the above configuration, the shielding plate 650 is provided, whereby it is possible to effectively prevent the cut ear stalks from entering the internal space of the threshing cylinder 600, and to easily perform maintenance and/or replacement of the threshing teeth frame 700.

That is, in the threshing process for cutting the ear stalks, the threshing teeth 730 may be worn or damaged.

In the present embodiment, a plurality of (3 in the illustrated embodiment) threshing teeth frames 700 are disposed on the outer surface of each of the plurality of divided shielding plates 650(1), 650(2) constituting the shielding plate 650, and one divided shielding plate 650(1), 650(2) is detachably fixed to the front side plate 620 and the rear side plate 630 by the plurality of (3 in the illustrated embodiment) threshing teeth frames 700 via fastening members 720.

In the above-described structure, only one threshing teeth frame 700 including the worn and damaged threshing teeth 730 may be removed in a state where the divided shielding plates 650(1), 650(2) are attached to the front side plate 620 and the rear side plate 630 via the remaining threshing teeth frame 700.

Therefore, maintenance and/or replacement work of the threshing teeth frame 700 having the threshing teeth 730 can be easily performed.

In the present embodiment, as shown in fig. 5 and 6, at least one of the plurality of divided shielding plates 650(1), 650(2) is provided with an opening (not shown) that opens the internal space of the threshing cylinder 600 to the outside, and the opening is covered by a cover 655 detachably attached to the divided shielding plate via a fastening member 656.

According to the above configuration, the workability when the need for processing the internal space of the threshing cylinder 600 arises can be improved.

In the present embodiment, as shown in fig. 7 to 9, etc., the front side circumferential extension 625, the rear side circumferential extension 635, and the shielding plate 650 are formed in a polygonal shape so that a plurality of flat surfaces facing radially outward are arranged in the circumferential direction of the threshing cylinder shaft 210 when viewed in the axial direction of the threshing cylinder shaft 210.

In the present embodiment, the front side circumferential extension 625, the rear side circumferential extension 635, and the shielding plate 650 have a 12-sided shape in which 12 flat surfaces 800 are arranged in the circumferential direction, when viewed in the axial direction of the threshing cylinder shaft 210.

The threshing teeth frames 700 are detachably fixed to the corresponding flat surfaces 800 of the front-side circumferential extension 625 and the rear-side circumferential extension 635 via the shielding plate 650 in a state where the support rod 710 is positioned on the flat surface 800 of the shielding plate 650.

According to the above configuration, the following effects can be obtained.

That is, as described above, in the present embodiment, the threshing teeth frame 700 is fixed to the front side plate 620 and the rear side plate 630 together with the shielding plate 650 via the mounting bracket 715 in a state of being positioned on the outer surface of the shielding plate 650.

In the above configuration, as shown in fig. 13, a gap 765 can be formed between the outer surface of the shielding plate 650 and the outer surface of the bottom wall 711a of the rod main body 711 (a surface facing radially inward with respect to the threshing cylinder shaft 210) in the radial direction of the threshing cylinder shaft 210.

If the harvested ear stalks are caught in the gap 765 at the time of threshing the harvested ear stalks by the threshing cylinder 600, a load may be applied to the transmission structure of the threshing cylinder 600, and threshing efficiency may be deteriorated.

In this regard, as in the present embodiment, when the plurality of threshing teeth frames 700 are positioned on the flat surfaces 800 of the shielding plate 650, the harvested stalks can be guided radially outward by the corner 810 positioned between the adjacent flat surfaces 800 of the shielding plate 650, and the harvested stalks can be effectively prevented from being caught in the gap 765.

Preferably, the number of the front circumferential extension 625, the rear circumferential extension 635, and the flat surface 800 of the shielding plate 650 is 2 times the number of the plurality of threshing teeth frames 700 provided in the threshing cylinder 600.

As shown in fig. 7 to 9, the threshing cylinder 600 according to the present embodiment includes 6 threshing teeth frames 700. Therefore, the number of the flat surfaces 800 is 12.

On this basis, one threshing teeth frame 700 is located on one flat face of the shielding plate 650, and the next threshing teeth frame 700 adjacent to the one threshing teeth frame 700 on the circumferential side of the threshing cylinder shaft 210 is located on the second flat face 800 adjacent to the one flat face 800 on the circumferential side of the threshing cylinder shaft 210.

In the present embodiment, as shown in fig. 7 to 9, the attachment bracket 715 is configured to: the threshing cylinder shaft 210 is accommodated in the flat surface 800 in the circumferential direction, whereby the threshing teeth frame 700 can be easily attached and detached.

In the present embodiment, as shown in fig. 10 and 11, the threshing cylinder 600 is provided with: a first intermediate plate 640(1) that is supported by the threshing cylinder shaft 210 so as to be non-rotatable between the front side plate 620 and the rear side plate 630; and a second intermediate plate 640(2) supported by the threshing cylinder shaft 210 so as not to rotate relative to each other between the first intermediate plate 640(1) and the rear side plate 630.

The first and second intermediate plates 640(1), (640), (2) each have: an intermediate radial extension 641 which is supported by the threshing cylinder shaft 210 so as not to be rotatable relative thereto; and an intermediate circumferential extension 645, which extends in the circumferential direction of the threshing cylinder shaft 210.

In this case, the plurality of divided shield plates 650(1), 650(2) constituting the shield plate 650 are wound around the intermediate circumferential extension 645 of the first and second intermediate plates 640(1), 640(2), in addition to the front-side circumferential extension 625 and the rear-side circumferential extension 635.

In the present embodiment, as shown in fig. 5, 6, 10, 11, and the like, the mounting bracket 715 provided to the support rod 710 includes first and second intermediate mounting brackets 715C (1) and 715C (2) detachably coupled to the first and second intermediate plates 640(1), (640), (2), respectively, by fastening members 720, in addition to the front and rear mounting

brackets

715F and 715R.

That is, in the present embodiment, the mounting bracket 715 provided to the support rod 710 includes the front mounting bracket 715F, the first intermediate mounting bracket 715C (1), the second intermediate mounting bracket 715C (2), and the rear mounting bracket 715R, which are arranged at the same positions as the front plate 620, the first intermediate plate 640C (1), the second intermediate plate 640C (2), and the rear plate 630, respectively, in the axial direction of the threshing cylinder shaft 210.

In the plurality of divided shielding plates 650(1), 650(2) constituting the shielding plate 650, through holes 652 (see fig. 10 and 11) are formed at positions corresponding to the mounting holes 717 of the first and second intermediate mounting brackets 715C (1), 715C (2) in a state of being wound around the front-side circumferentially extending portion 625, the intermediate circumferentially extending portion 645 of the first intermediate plate 640C (1), the intermediate circumferentially extending portion 645 of the second intermediate plate 640C (2), and the rear-side circumferentially extending portion 635 (see fig. 10 and 11).

In the intermediate circumferential extension 645 of the first intermediate plate 640(1) and the intermediate circumferential extension 645 of the second intermediate plate 640(2), attachment holes are formed at positions facing the attachment holes of the corresponding first intermediate attachment bracket and second intermediate attachment bracket 715, respectively.

In the above configuration, the threshing teeth frame 710 is detachably fixed to the first and second intermediate plates 640C (1) and 640C (2) in addition to the front side plate 620 and the rear side plate 630 by the fastening member 720 in a state of being disposed on the shielding plate 650.

As shown in fig. 5 and the like, in the threshing cylinder 600 according to the present embodiment, in addition to the threshing section 600B formed by the shielding plate 650 and the threshing teeth frame 700, a raking section 600A that conveys the harvested ear stalks toward the threshing section 600B as the threshing cylinder shaft 210 rotates is provided at a position further forward than the threshing section 600B.

The raking section 600A has a plurality of spiral blades 760, and these spiral blades 760 convey the cut ear stalks toward the threshing section 600B in accordance with the rotation of the threshing cylinder shaft 210, and they are arranged at equal intervals around the axis of the threshing cylinder shaft 210.

In the present embodiment, as shown in fig. 5 to 11, the rake part 600A includes a truncated cone-shaped drum body 750, the drum body 750 is supported by the threshing cylinder shaft 210 so as to be relatively non-rotatable, and is connected to the front side plate 620 at a rear end surface via a fastening member, and the plurality of spiral blades 760 are provided on an outer peripheral surface of the drum body 750.

Description of reference numerals

210 threshing cylinder shaft

600 threshing cylinder

620 front side plate

621 front side radial extension

625 front side circumferential extension

630 rear side board

631 rear radial extension

635 rear side circumferential extension

640(1), 640(2) a first middle plate and a second middle plate

641 middle radial extension part

645 intermediate circumferential extension

650 shield plate

650(1), 650(2) the first and second resolving shields

700 threshing teeth frame

710 support bar

711 Bar body

715 mounting bracket

717 mounting plate

720 fastening connecting component

730 threshing teeth

765 gap

800 flat surface

Claims

1. A threshing cylinder, which is characterized in that,

the threshing cylinder is provided with: the front side plate and the rear side plate are fixedly connected with the threshing cylinder shaft; a shielding plate attached to the front side plate and the rear side plate so as to form an internal space covering the periphery of the threshing cylinder shaft; and a plurality of threshing teeth frames which comprise a supporting rod formed by a pipe and a plurality of threshing teeth arranged along the length direction of the supporting rod with intervals,

the threshing teeth frames are arranged on the outer surface of the shielding plate at intervals in the circumferential direction of the threshing cylinder shaft in a state where the support rod is parallel to the threshing cylinder shaft and the threshing teeth extend radially outward.

2. Threshing cylinder according to claim 1,

the front side plate is provided with a front side radial extension part fixedly connected with the threshing cylinder shaft and a front side circumferential extension part extending along the circumferential direction of the threshing cylinder shaft,

the rear side plate has a rear radial extension part fixedly connected to the threshing cylinder shaft in a manner of being opposed to the front radial extension part, and a rear circumferential extension part extending in the circumferential direction of the threshing cylinder shaft,

the shielding plate is wound around the front side circumferential extension part and the rear side circumferential extension part,

the support rod has: an elongated stem body; and a front mounting bracket and a rear mounting bracket fixedly attached to the lever main body,

the front side circumferential extending portion, the rear side circumferential extending portion, and the radially outward facing surface of the shielding plate are arranged in the circumferential direction of the disengagement cylinder shaft,

the front-side mounting bracket and the rear-side mounting bracket are detachably fixed to corresponding radially outer surfaces of the front-side circumferential extending portion and the rear-side circumferential extending portion, respectively, with the shield plate interposed therebetween, in a state where the lever main body is positioned on a radially outer surface of the shield plate.