JP3585403B2 - Mowing unit transmission structure of reaper - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mowing unit transmission structure of a reaper such as a combine or a binder, and more specifically, by improving the structure of a transmission shaft for driving a raising device, a mowing grain culm can be increased without increasing the size of the mowing unit. The present invention relates to a technique for favorably transporting.
[0002]
[Prior art]
As shown in Japanese Patent Application Laid-Open No. H10-146124, as a driving structure of the mowing unit, one transmission shaft interlocked with an input shaft provided in one mowing main frame supporting the mowing unit is used. A structure in which the respective raising devices are driven from above through a single left-right transmission shaft disposed above the plurality of raising devices and raised and disposed on one of the left and right sides of the reaper. An "arch drive structure" is known.
[0003]
Then, as shown in Japanese Utility Model Laid-Open Publication No. 63-53219, the power of the input shaft passing through the inside of the reaper main frame is transmitted to a plurality of vertical transmissions for driving a plurality of raising devices below the grain culm conveying path. There is also known a structure in which each raising device is driven from below via a left-right transmission shaft interlocked with the shaft, a so-called "archless drive structure". These mowing unit drive structures are appropriately set according to the model and specification settings such as the number of mowing lines, mowing targets, and regions.
[0004]
[Problems to be solved by the invention]
In the case of employing the "archless drive structure", which is the latter technique, the vertical transmission shaft that interlocks the left and right ends of the mowing transmission shaft and the upper portion of the raising device in an interlocking manner is disclosed in Japanese Utility Model Application Laid-Open No. 61-197832. In addition, due to the physical structural relationship between the required length of the cutting power transmission shaft and the location of the raising device, the vertical transmission shaft at the right end falls down and tilts so that the upper part moves to the left, and the vertical transmission shaft at the left end. In many cases, the upper part of the wing falls down and leans to the right.
[0005]
In such a structure, the longitudinal transmission shaft may be a straight line, and there is an advantage that it can be economically constructed with the shortest shaft length.However, the width of the grain stalk transport path becomes narrower toward the top, and there is no snagging. This is disadvantageous in obtaining a good cereal culm transport state. An object of the present invention is to make it possible to convey grain stalks more smoothly without impairing the function of driving the raising device by devising the structure of the vertical transmission shafts arranged at the left and right ends of the mowing unit.
[0006]
[Means for Solving the Problems]
〔Constitution〕
The configuration of claim 1, in reaper transmission structure of the reaper, the lower end of the vertical transmission shaft is part reaper the reaper transmission shaft extending in right and left are respectively interlocked vertically facing the drive to cause the left and right end device A vertical transmission shaft, a lower shaft portion interlockingly connected to the mowing transmission shaft, and a raising device side interlockingly connected to the upper end portion of the lower shaft portion in a state in which the upper side falls inward in the left-right direction. And an upper shaft portion.
[0007]
According to a second aspect of the present invention, in the configuration of the first aspect, the reaping unit includes a lateral transport device that collects and raises the raised and mown grain stalks at right and left intermediate locations and transmits power to the horizontal transport device. The part is provided on the lower shaft portion.
[0008]
[Action]
According to the configuration of the first aspect, the vertical transmission shaft is configured by the lower shaft portion and the upper shaft portion whose upper side is inclined inward in the left-right direction with respect to the lower shaft portion. Widening the left-right gap between the vertical transmission shafts at the left and right ends, without changing the length of the mowing transmission shaft or the position of the raising device, such as providing the upper shaft portion in the state of falling inward with respect to the part, especially The lower part can be clearly enlarged. Therefore, the transport path of the harvested grain culm mainly in the stock side portion is wider than before, and the stock side portion rubs against the casing of the vertical transmission shaft, and the risk of transport disturbance due to it is reduced or eliminated. become.
[0009]
According to the configuration of the second aspect, the following operation is provided. That is, most of the horizontal transport device is constituted by an endless rotating band such as a belt with a locking claw or a chain with a projection. Corresponds to the level of the stem side of the cereal stem. Therefore, if the power is received from the lower shaft portion, the horizontal conveyance device can be driven with a simple transmission structure such as simply winding the chain around the lower shaft portion, and the power is transmitted from the upper shaft portion. As compared with the case where the direction is once changed via the bevel gear and then transmitted to the lateral conveyance device as in the case, it is advantageous in terms of simplification of the structure and arrangement space.
[0010]
〔effect〕
As a result, in the reaper according to any one of claims 1 and 2, the vertical transmission shafts for driving the raising device located at the left and right ends of the reaper are divided into a plurality of upper and lower shafts, and the upper shaft is used as the lower shaft. By simply remodeling it to the inside, it is possible to widen the grain culm transport path without increasing the width of the mowing part, and to provide a mowing part transmission structure that can transport the grain culm more smoothly and better. did it.
[0011]
The mowing portion transmission structure according to the second aspect has an advantage that the horizontal transport device located at the lower portion of the mowing portion can be economically driven with a simple power transmission structure by using the lower shaft portion.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a front side of a self-removable combine for three-row cutting, and the combine is provided on a front part of a traveling machine body 1 provided with a pair of left and right crawler traveling devices 1A. A cutting unit 2 that cuts the planted grain culm and conveys it toward the upper left rear is connected to the left and right swing shafts P so as to be able to swing up and down. A threshing device 3 that receives the grain culm and performs threshing and sorting processing, and on the right side of the traveling machine body 1, a grain tank 4 for storing the sorted grains from the threshing device 3 and an operator are mounted. The control unit 5 is mounted on the vehicle.
[0013]
As shown in FIGS. 1 to 4, the cutting unit 2 includes four weeding tools 6 that act on the root side of the planted grain culm and vegetate, and three plants that cause the weeded planted grain culm. Raising device 7, clipper-type cutting device 8 for cutting the stem side of raised planted grain culm, and scraping and transporting planted grain culm (cutted grain culm) cut by the cutting toward the rear 3 A first transporting device 9, a pair of left and right second transporting devices (an example of a horizontal transporting device) 10 for transporting the harvested culm stalks conveyed rearward while gathering them at the left and right centers, and gathering them at the left and right centers. A third transporting device 11 that feeds and transports the harvested grain culm from the standing posture to the lying posture while gradually changing the posture to the rearward threshing device 3, and a cutting frame 12 that supports them. .
[0014]
As shown in FIGS. 3 and 4, each raising device 7 includes an erect raising case 7 a, a driving sprocket 7 b arranged on an upper portion of the raising case 7 a on the path side (inner side) for raising the planted grain, and a raising case. A driven sprocket 7c provided at the lower portion of the rotating shaft 7a, a rotating chain 7d wound around the sprockets 7b and 7c, and a posture that can be changed to a posture and a retracted posture caused by the rotating chain 7d at regular intervals. , And a tension sprocket 7f arranged on the upper part of the raising case 7a on the return path side, and the locking and lifting action of the raising claw 7e that rises in the raised posture. The planted culm is raised.
[0015]
As shown in FIG. 1, FIG. 2, FIG. 4, and FIG. 5, each of the first transporting devices 9 includes a driving pulley 9a provided on the rear side, a driven pulley 9b provided on the front side, and the pulleys 9a. , 9b, and the like, and a packer 9B disposed below each drive pulley 9a. The raked culm is raked and conveyed by the locking and conveying action of the packer 9A and the packer 9B.
[0016]
The second transporting device 10 on the left side includes a nipping transport mechanism 10A and an upper and lower two-stage locking transport mechanism 10B. The nipping transport action of the nipping transport mechanism 10A and the locking of each locking transport mechanism 10B are performed. The harvesting culm is collected and transported by the transport action. The nipping and conveying mechanism 10A is provided between a driving sprocket 10a provided at the left end, a first driven sprocket 10b provided at the center on the left and right, and a driving pulley 9a and a packer 9B in the first transfer device 9 on the left. A second driven sprocket 10c and a chain 10d with a projection wound around the sprockets 10a to 10c.
[0017]
As shown in FIG. 2, FIG. 4 and FIG. 5, the second transporting device 10 on the right side has a driving sprocket 10a provided on the right end, a first driven sprocket 10b provided on the center in the left and right directions, and a first sprocket 10b on the right side. Nipping conveyance constituted by a second driven sprocket 10c provided between the driving pulley 9a and the packer 9B in the conveyance device 9, and a chain 10d with a projection wound around the sprockets 10a to 10c. Only the mechanism 10A is provided, and the nipping and conveying mechanism of the nipping and conveying mechanism 10A carries out the gathering and transport of the harvested grain culm.
[0018]
As shown in FIGS. 1, 2, and 4, the third transport device 11 includes a nipping transport mechanism 11A and a locking transport mechanism 11B, and the nipping transport action of the nipping transport mechanism 11A and the locking transport mechanism 11B. The feeding and transport of the harvested grain culm is performed by the locking and transporting action of the cutting grain, and the root side of the harvested grain culm is passed to the feed chain 3a of the threshing device 3 and the tip side of the harvested grain culm is guided into the threshing device 3. Has become. Further, since the locking transport mechanism 11B of the third transport device 11 is configured to extend from above the rear portion of the first transport device 9 on the right side to the feed chain 3a of the threshing device 3, the front portion thereof is formed. , And functions as a locking and transporting mechanism 10B of the second transporting device 10 on the right side to collect and transport the harvested grain culm.
[0019]
As shown in FIGS. 1 and 4, on the axis P, which is the vertical swinging fulcrum of the mowing unit 2, an input pulley 13 to which power from an unillustrated engine is transmitted at the right end is a left-right direction. A counter shaft 14 is provided, and power is transmitted to the raising device 7, the mowing device 8, the first transport device 9, the second transport device 10, and the third transport device 11 via the counter shaft 14. I have to.
[0020]
The transmission structure will be briefly described. As shown in FIGS. 1, 2, and 4 to 7, a main transmission shaft (input shaft) extending forward and downward from the counter shaft 14 In the example, 15 is provided at the front end of the main transmission shaft 15 with the left and right central portions of the first transmission shaft 16 facing left and right, and at the left and right ends and the left and right central portions of the first transmission shaft 16 from the first transmission shaft 16. The lower end of the vertical second transmission shaft 17 extending over the corresponding raising device 7 is connected to the driving shaft 7g of the corresponding raising device 7 at the upper end of each second transmission shaft 17 via a bevel gear 18, respectively. Have been. That is, the motive power input to the counter shaft 14 is transmitted to each raising device 7 via the main transmission shaft 15, the first transmission shaft 16, and the second transmission shaft 17.
[0021]
As shown in FIG. 1, FIG. 2 and FIGS. 4 to 7, each second transmission shaft 17 has a two-part structure composed of a lower shaft portion 17b and an upper shaft portion 17c which are transmission-coupled via a bevel gear 17a. I have. Among the lower shaft portions 17b, the left and right lower shaft portions 17b are directed to the upper portions of the corresponding left and right raising devices 7, and the central lower shaft portion 17b is positioned below the corresponding central raising device 7. In the heading state, each is set in a state of rising at right angles to the first transmission shaft 16.
[0022]
Of the upper shaft portions 17c, the left and right upper shaft portions 17c are inclined toward the center toward the corresponding drive shafts 7g of the left and right pulling devices 7, and the central upper shaft portion 17c corresponds to the drive shaft 7g. In a state of being inclined toward the drive shaft 7g of the central raising device 7, the posture is set so as to extend from the lower shaft portion 17b to which the power is connected and connected to the driving shaft 7g of the raising device 7. That is, the upper shaft portion 17c on the raising device side is interlocked and connected to the upper end of the lower shaft portion 17b in a state where the upper side of the lower shaft portion 17b is inclined inward in the left-right direction with respect to the lower shaft portion 17b.
[0023]
Of the lower shaft portions 17b, the drive sprockets 10a of the corresponding nipping and transporting mechanism 10A of the second transporting device 10 are externally fitted to the left and right lower shaft portions 17b so as to rotate integrally. That is, in a state where the lower shaft portions 17b of the left and right second transmission shafts 17 are also used as the drive shafts of the second transfer device 10, the corresponding left and right second transmission shafts 17 and the second transfer device 10 are interlocked and connected. I have.
[0024]
As shown in FIGS. 4 and 6, in the reaping device 8, the movable cutting blade 25 is linked to the crankshaft 20 which is operatively connected to the first transmission shaft 16 via a bevel gear 38. That is, the power from the first transmission shaft 16 is transmitted to the reaper 8.
[0025]
As shown in FIGS. 1, 2, and 4, the third transport device 11 includes a driving sprocket of a nipping transport mechanism 11 </ b> A on a third transmission shaft 22, which is transmission-connected to a left end portion of a counter shaft 14 via a bevel gear 21. 11a and a driving sprocket 11e of the locking and conveying mechanism 11B are externally fitted so as to rotate integrally. That is, the power from the counter shaft 14 is transmitted to the third transfer device 11 via the third transmission shaft 22.
[0026]
As shown in FIGS. 1, 8, and 9, the mowing device 8 includes a receiving blade base mounted over a plurality of support frames 12 x extending forward to mount the fixed weeding tool 7 on the mowing frame 12. The receiving blade 24 is fixed to the blade 23, the cutting blade 25 is slidable to the left and right, and the knife head 27 is fixed to the cutting blade 25 via a mounting stay 26. The knife head 27 includes a plate material bent in a backward open U-shape in plan view, and has a bearing roller 29 rotatably supported by a crank mechanism 28 around a longitudinal axis X. The inside of the knife head 27 is fitted just in conformity with the inside dimensions.
[0027]
The crank mechanism 28 is configured by welding a cutting blade crank 30 to the tip of a cutting blade drive shaft 20 that is a crank shaft, and rotatably fitting a bearing roller 29 to the cutting blade crank 30. The rear portion of the right end support frame 12x is bent leftward, and is bolted to a side surface of a shaft support case portion 35a described later via a flange 42 fixed to the rear end.
[0028]
As shown in FIGS. 8 and 9, the cutting blade 25 and the mounting stay 26 are integrated with rivets or the like together with a slider 31 that is a knife bar that slides on the rear end surface of the receiving blade 24, and a knife that holds the cutting blade 25. A slat 33, which is tightened up and fixed together with the clip 32, slides on the rear end face of the slider 31 so that the cutting blade 25 is positioned up and down, front and rear, and slides only to the left and right.
[0029]
A bearing roller 29, that is, a cutting blade crank 30 is disposed and arranged behind the right side portion of the receiving blade base 23. The cutting blade drive shaft 20 having the cutting blade crank 30 at the front end is supported in a front-rear direction on a shaft supporting case portion 35a integrally formed with a horizontal shaft case 35 which is a casing of the cutting transmission shaft 16. The shaft core Q is located substantially at the center of the knife head 27 in the vertical direction.
[0030]
Further, the cutting blade crank 30 is formed in a disk shape integrally provided with a first balance weight 34 bulging in the axial direction on the opposite side of the bearing roller 29 mounting portion with respect to the rotation axis Q. 25 as a balancer that cancels the vibration caused by the lateral movement of the cutting blade 25 and reduces the vibration caused by the rotation of the cutting blade crank 30, and also functions as a flywheel that smoothes the load fluctuation caused by the rotation of the cutting blade drive shaft 20. It has become.
[0031]
The rotating power of the cutting blade drive shaft 20 is transmitted by a bevel gear mechanism 38 having an occlusion structure of a small-diameter bevel gear 36 fitted to the rear end thereof and a large-diameter bevel gear 37 fitted to the mowing transmission shaft 16. It is. A countershaft 39, which is linked to the mowing transmission shaft 16 via a bevel gear mechanism 38 and rotates at the same speed at the same speed per unit time in the direction opposite to the rotation direction of the cutting blade drive shaft 20, The countershaft 39 is provided with a second balance weight 40 at the rear end of the countershaft 39 to oppose the lateral movement of the cutting blade 25.
[0032]
That is, the counter shaft 39 is rotatably supported on the second shaft support case portion 35b formed integrally with the horizontal shaft case 35 on the rear side of the shaft support case portion 35a. The small-diameter bevel gear 41 to be engaged is fitted as the same component (the same diameter and the same number of teeth) as the small-diameter bevel gear 36 of the cutting blade drive shaft 20. The second balance weight 40 has a weight 40a provided on the outer peripheral end of the disk 40b. When the position of the center of gravity of the first balance weight 34 is directly above the axis Q, the second balance weight 40 is A bevel gear mechanism 38 including three bevel gears 36, 37, 41 is set such that the center of gravity is located directly below the axis Q.
[0033]
The first balance weight 34 is provided so that its center of gravity is located directly opposite to the crank mechanism 28 with respect to the cutting blade drive shaft 20, and functions to correct the eccentricity of the cutting blade drive shaft 20 due to the presence of the crank mechanism 28. Further, it has a function of moving the cutting blade 25 to the side opposite to the lateral movement thereof to offset the moving inertia of the cutting blade 25. However, since the mass for canceling the inertia of the cutting blade 25 is larger than the mass of the crank mechanism 28, when the first balance weight 34 moves in the up and down direction in which the inertia canceling action with the cutting blade 25 does not work. The rotational balance is biased, and vibration is likely to occur.
[0034]
Therefore, the cutting blade drive shaft 20 and the counter shaft 39 having the coaxial core Q are configured so that both the shafts 20 and 39 are rotated at the same speed in opposite directions to each other. By providing the second balance weight 40 that opposes the lateral movement, a means for eliminating the above-described vertical vibration is configured. The cutting blade drive shaft 20 and the counter shaft 39 are independently supported by bearings, and the cutting power transmission shaft 16 may be a single component as in the prior art, and a hexagonal shaft extending right and left through the bevel gear mechanism 41. Is configured.
[0035]
As shown in FIGS. 1 and 5 to 7, the raising device 7 such as the counter shaft 14 and the main transmission shaft 15, the reaping device 8, the first transport device 9, the second transport device 10, and the vertical transport device 11 Each transmission system is housed in a member constituting the reaping frame 12. That is, the mowing frame 12 is configured by cases surrounding these power transmission systems. Therefore, in the mowing frame 12, the left and right vertical axis cases 46 and 48, which are the casings surrounding the lower shaft portions 17b of the left and right second transmission shafts 17, pass the projecting chain 10d of the second transport device 10 through. An allowable opening 19 is formed, from which the projecting chain 10d is wound around the driving sprocket 10a mounted on the lower shaft portion 17b.
[0036]
Here, the structure of the tensioner T that tensions the chain 10d with projections in the nipping and conveying mechanism 10A will be described with reference to the right nipping and conveying mechanism 10A. As shown in FIGS. 15 to 17, the tensioner T is constituted by a torsion coil spring 76 fitted on a support shaft 75 made of a pipe material which is vertically fixed to the main pipe 51 of the right raking frame 43. I have. That is, a tension portion 76A formed by folding the free end side (rear end side) of the torsion coil spring 76 made of a round bar-shaped spring material directly contacts the chain roller 77 of the chain 10d with projections and presses it. It is configured.
[0037]
The tension portion 76A has a one-stage bending structure that is set to have a width slightly smaller than the inner width of each of the pair of inner chain links 78 in the chain 10d with protrusions, and contacts the chain roller 77 at two locations in the width direction. The bar spring material is formed in an arc shape that vertically overlaps in plan view. Therefore, a tension force can be applied to the projecting chain 10d having a relatively wide chain width in a regular direction orthogonal to the rotation axis of the projecting chain 10d while using a round bar spring material. You can be nervous without falling down.
[0038]
Next, a support structure of the first transfer device 9 will be described. As shown in FIG. 10, in each of the raking frames 43 to 45 supporting each first transporting device 9, the rear portion is divided into vertical axis cases 46 to 48 surrounding the second transmission shaft 17, and the front portion is divided. It is detachably attached to the raising device support frame 49 fixed to the weeding frame 12x supporting the weeds 6 by bolting.
[0039]
The right raking frame 43 on the right side includes a main pipe 51 whose front end is bolted to a stay 50 projecting rearward from the right raising device supporting frame 49, and a bolting bolt on the first vertical case 48 on the right side. , And a transport cover 54 which is also a member constituting a transport route for the grain culm.
[0040]
The drive pulley 9a and the support shaft 9p of the packer 9B are fixed through the main pipe 51 at the front and rear intermediate portions, and a stay 51b for supporting the driven pulley 9b, which is a tension pulley, as a long hole is welded to the front end portion. A support shaft 55 that rotatably supports the first driven pulley 10b of the right sandwiching and conveying mechanism 10A is fixed through the end portion. The tip of the auxiliary pipe 52 is welded to the support shaft 9p of the main pipe 51. The transport cover 54 (61), which covers the rotatable belt 9c with projections from above, is press-molded in a stepped shape to increase strength (see FIG. 11).
[0041]
As shown in FIGS. 12 and 13, the bracket 53 is made of a plate material bent in a U-shape in plan view, and is a joining portion of the front case portion 48 a and the rear case portion 48 b constituting the first longitudinal case 48. Are fixed together with four bolts for connecting these case portions 48a and 48b. The rear end of the auxiliary pipe 52 bent downward is welded to the bracket 53.
[0042]
As shown in FIGS. 10 and 11, the left left raking frame 45 is a main pipe whose front end is bolted to a vertical plate-like stay 56 projecting rearward from the left raising device supporting frame 49. 57, a bracket 59 which is bolted to the second longitudinal axis case 46 on the left side, and an auxiliary pipe 58 provided with the bracket 59 at the rear end, and a transport cover which is also a member constituting a transport route for the grain culm. 61, and has basically the same structure as the right raking frame 43.
[0043]
A step-shaped transfer cover 61 press-formed in the same manner as the right transfer cover 54 is supported by two front and rear stays 62 and 63, and the rear stay 63 is equipped with a driving pulley 9a and a support shaft 10p of a packer 9B. Have been. The left bracket 59 has the same structure as the right bracket 53, and is jointly fastened with a connecting bolt between the front case part 46 a and the rear case part 46 b of the second longitudinal case 46, and the auxiliary pipe 58 extends over the main pipe 57. A sheet metal guide 65 for forming a movement path of the chain 10d with projections is attached to the rear end of the main pipe 57 and the left bracket 59.
[0044]
As shown in FIGS. 10 and 14, the left and right center raking frames 44 are basically pipes that are bolted to a third vertical case 47 made of pipe material surrounding the left and right center upper shaft portion 17 c. It is composed of only the frame 67, and the press-formed transport cover 68 functions as an auxiliary frame. That is, the transport cover 68 is fixed to the pipe frame 67 whose rear end is bolted to the bracket 66 fixed to the third longitudinal axis case 47, and the front end of the transport cover 68 is raised second from the left. It is bolted to a stay 60 projecting rearward from the device support frame 49.
[0045]
A driving pulley 9a and a support shaft 67a of a packer 9B are fixed to the front end of the pipe frame 67. A bolted portion between the transport cover 68 and the stay 60 allows the driven pulley 9b to be adjusted in tension. It has a long hole support structure. In other words, the raking frames 43 to 45 of any of the three first transporting devices 9 are supported at two places with the casings 46 to 48 surrounding the second power transmission shaft 17, which hinders grain culm transport. I am trying not to be. Each of the three raking frames 43 to 45 has a detachable structure by bolting.
[0046]
Next, the structure of the connection between the left and right vertical axis cases 46 and 48 and the horizontal axis case 35 will be described. The structure of these two connecting portions is the same except that the directions are opposite to each other, and for the sake of simplicity, the right side will be described.
[0047]
As shown in FIGS. 11 to 14, a flange portion 71 for bolting the horizontal shaft case 35 is provided on the left side surface at the lower end of the cylindrical right vertical axis case 48 having the lower shaft portion 17 b therein. The cutting power transmission shaft 16 inserted from the flange portion 71, and the bevel gears 18, 18 for interlocking connection between the cutting power transmission shaft 16 and the lower shaft portion 17b are housed therein. The right vertical axis case 48 and the horizontal axis case 35 use four bolts 73 in a state where the relative posture is determined by the spigot part 72 and the positioning means A fitted in the axial direction of the mowing transmission shaft 16. It is connected and integrated.
[0048]
The right vertical case 48 has a split structure formed by connecting a front case portion 48a and a rear case portion 48b each having a split surface w along the axial direction of the cutting power transmission shaft 16, and the cutting power transmission shaft The respective holder portions 74 for positioning and supporting the bearings supporting the lower shaft portion 16 and the lower shaft portion 17b function in a state of only molding, and do not require any machining such as cutting. Further, the above-described flange portion 71 and opening 19 are both formed so as to straddle both case portions 48a and 48b.
[0049]
The opening 19 connects an inlet 19b for pulling the chain 10d with protrusions, which are endless rotating bands, into the left and right vertical cases 48 and 46, and an outlet 19a for sending the chain 10d with protrusions out of the vertical cases 48 and 46. It is formed independently. That is, the inlet 19b is formed in the rear case portions 48b, 46b, and the outlet 19a is formed in the front case portions 48a, 46a, respectively, and the inlet 19b as the longitudinal case 48, 46 to which the front and rear case portions are assembled. As described above, the portion between the outlet 19a and the left and right scraping frames 43, 45 is reinforced by connecting the brackets (frames for supporting the horizontal transport device) 53, 59.
[0050]
Incidentally, the main case portion 35S of the horizontal shaft case 35 has an upper and lower split structure including an upper case portion 35A having a split surface v and a lower case portion 35B, and the left and right holes 70 of the lower case portion 35B are machined. Is formed by The left vertical axis case 46 and the horizontal axis case 35 are connected by four bolts 73 using the same positioning means A and the spigot 72 as in the above-described structure.
[0051]
As shown in FIGS. 6 and 10, the horizontal shaft case 35 surrounding the first transmission shaft 16 includes a first vertical case 48 made of aluminum die-casting and surrounding the lower shaft portion 17 b on the right side, and the main transmission shaft 15. In the surrounding state, the reaping main frame 12F made of an iron pipe for supporting the reaping unit 2 on the body and the third longitudinal axis case 47 surrounding the lower shaft portion 17b at the left and right center are connected and integrated, and the crankshaft 20 is integrated. The main case portion 35S made of cast iron, in which the surrounding shaft supporting case portion 35a and the second shaft supporting case portion 35b are integrally formed, and the second vertical axis case 46 made of aluminum die casting surrounding the lower shaft portion 17b on the left end. And a sub-case 35H made of an iron pipe connected and integrated with the sub-case 35H.
[0052]
In other words, the horizontal shaft case 35 with the severe load conditions connected to the reaper main frame 12F is made of iron and has a sufficient strength, and has a strength sufficient to support one raising device 7, and the upper and lower portions are not required. The first and second longitudinal cases 48 and 46 which are required to have a relatively complicated shape having the opening 19 for driving the chain at their parts are made of aluminum die-casting so that the number of parts is small and the structure can be simple and inexpensive.
[0053]
[Another embodiment]
When viewed from the front, the lower shaft portion 17b at the left and right ends is a vertical transmission shaft 17 in which the upper shaft portion 17b is opened upward and inclined in a direction in which the upper portion is directed outward, and the upper shaft portion 17c is vertically erected. The shaft portion 17b may be a vertical transmission shaft 17 in which the upper portion thereof narrows upward in a direction toward the inside and the upper shaft portion 17c is tilted inward more greatly than the inward tilt angle. In short, the lower shaft portion 17b It is sufficient if the upper shaft portion 17c falls inward in the left-right direction.
[Brief description of the drawings]
FIG. 1 is a side view of a front part of a self-removing combine. FIG. 2 is a plan view showing a configuration of a cutting unit. FIG. 3 is a front view showing a configuration of a cutting unit. FIG. 4 is a system diagram showing a transmission system of the cutting unit. 5 is a plan view showing a pre-processing portion of the reaper. FIG. 6 is a front view of a partially cut-away view showing a main part of a transmission system in FIG. 5. FIG. 7 shows a transmission structure of a second transfer device on the left side. FIG. 8 is a partially cutaway plan view showing the drive structure of the reaper. FIG. 9 is a partially cutaway side view showing the drive structure of the reaper. FIG. FIG. 11 is a plan view showing a structure. FIG. 11 is a side view of a partially cutaway showing a left raking frame portion. FIG. 12 is a plan view showing a partial cutout showing a bracket portion of a right raking frame. 12 is a front view of FIG. 14; FIG. 15 is a side view of a partially cutaway portion showing a central rake frame portion; FIG. 15 shows a structure of a tensioner Plan view and FIG. 16 is a front view showing the relationship between the tensioner and the protruding chain with 17 is a perspective view of the tensioner EXPLANATION OF REFERENCE NUMERALS
2 Cutting unit 7 Raising device 10 Horizontal transport device 10a Power take-out unit 15 Input shaft 16 Cutting transmission shaft 17 Vertical transmission shaft 17b Lower shaft s portion 17c Upper shaft portion

Claims (2)

At the lower end of the reaping unit, a cutting transmission shaft extending left and right is provided at the lower end of the cutting unit, and a vertical transmission shaft for raising and lowering the driving device at the right and left ends is connected to the cutting transmission shaft. A reaper comprising a lower shaft portion, which is connected to an upper end portion of the lower shaft portion which is operatively connected to an upper end portion of the lower shaft portion in a state where the upper side of the lower shaft portion leans inward in the left-right direction. Part transmission structure. A lateral transport device for collecting and transporting the raised and harvested culm at an intermediate position in the left and right directions is provided in the cutting unit, and a power take-out unit for transmitting power to the horizontal transport device is provided in the lower shaft part. 2. The mowing unit transmission structure of the mowing machine according to 1.

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