JP3597088B2 - Combine grain stalk transport structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a grain culm transport structure of a combine, and in particular, threshing while changing the cereal culm in a standing posture, which has been mowed and gathered at an intermediate position on the left and right sides, to a reclined posture in which a tip side faces inward in the lateral direction of the machine body. The present invention relates to an improvement in a vertical transport device that transports a sheet to an apparatus.
[0002]
[Prior art]
A vertical transport device in a combine transports a harvested grain culm obliquely rearward and upward using a stock-holding and transporting mechanism and a tip-locking transporting mechanism. For example, Japanese Patent Application Laid-Open No. H11-75486, As disclosed in Japanese Unexamined Patent Publication No. Hei 11-28023, the transport path of the tip side portion of the grain stem by the tip locking and transporting mechanism is set as a straight path from the lower right front to the upper left rear.
[0003]
[Problems to be solved by the invention]
In the conventional vertical transport device, the grain culm at the rear end is laid down so that it is as close as possible to the horizontal position (position in which the stock is clamped by the feed chain) suitable for entering the handle of the threshing device. Based on this point, the rear end positions of the stock-holding and transporting mechanism and the tip-locking and transporting mechanism are determined. This means that in the head-locking and conveying mechanism, the position of the rear sprocket is determined, and then the chain with the projection extends over the sprocket and the front sprocket set at a position where the conveying action can be applied to the rightmost grain culm. , The linear transport path of the tip locking transport mechanism is set.
[0004]
Then, the stock-holding / conveying mechanism is usually divided into a plurality of parts, and in a plan view, the distance in the left-right direction with respect to the tip locking / conveying mechanism is increased as going backward, so that the grain culm posture is changed from the standing posture. The posture is changed to the reclining posture. Therefore, the harvested grain culm that is fed backward has a tendency that the stock side comes into contact with the stock holding mechanism and receives the action, and then the tip side comes into contact with the tip locking and transferring mechanism and receives the action. Therefore, there is a risk that the tip of the spike is delayed due to the above.
[0005]
An object of the present invention is to provide a vertical transport device that can smoothly and satisfactorily transport grain stalks while changing the grain stalk posture, mainly by remodeling a tip locking transport mechanism, without delay of the tip or disturbance of the transport attitude due to the tip. The point is to gain.
[0006]
[Means for Solving the Problems]
〔Constitution〕
According to a first aspect of the present invention, in a grain culm conveying structure of a combine, a stalk-holding and conveying mechanism that squeezes and conveys a stalk side and a head-locking and conveying mechanism that locks and conveys a spike-side are cut and left and right. A vertical conveying device that conveys the grain culm of the standing posture gathered at the intermediate position toward the threshing device while changing the spike side to the reclining posture in which the tip side faces inward in the lateral direction of the machine,
The vertical conveying device is pivotally supported so as to be able to swing around a left-right fulcrum provided at a rear portion thereof, so that a change in the handling depth of the threshing device can be adjusted,
The tip locking transport mechanism is constituted by an endless rotating band with locking claws wound around the front and rear wheels, and a pair of front and back frames supporting the same,
A guide portion that guides the sliding portion of the endless rotating band is formed in each of the frame bodies, and a portion of the guide portion located on the grain culm transport side of the endless rotating band, the front and rear intermediate portion thereof in front and rear in plan view. It is formed so as to have a mountain shape that protrudes far away from the line connecting the rings ,
Construct the frame in a symmetrical shape with the same shape before and after in the transport direction, bordering on the middle position in the longitudinal direction,
In comparison with the movement trajectory of the grain culm conveyance side portion of the endless rotating belt in plan view, the movement trajectory of the pinch action portion of the stock pinch conveyance mechanism in plan view is largely separated at the end of the conveyance path. It is characterized in that a transport mechanism and a tip locking transport mechanism are provided.
[0008]
[Action]
According to the configuration of claim 1, for example, as shown in FIG. 16, the movement trajectory of the endless turning band with projections on the grain culm conveyance side portion in plan view, moving locus of the pinching action portion, since disposing the strain based pinching transport mechanism and tip locking transport mechanism so as to separate largely conveyance path terminating, in the movement locus of the culms conveying portion of the endless rotating belt The front portion has a steeper right-rear inclination in plan view (a component moving backward becomes smaller) than in the past, so that the front side of the harvested culm is actively picked up. Therefore, when the harvested grain culm is delivered to the vertical transport device, the time when the tip side receives the action of the tip locking transport mechanism with respect to the time when the stock side receives the action of the pinch holding transport mechanism is advanced, The tip delay and the transport disturbance due to it are suppressed or eliminated.
[0009]
Then, the rear part of the movement locus on the tip side has a gentler inclination toward the rear right in plan view (a component moving to the right side becomes larger) as compared with the conventional case, and the sideways angle with respect to the unit transport distance of the grain stem is sharply increased. In other words, the following effects are obtained by making the cereal stalk posture in the front and rear intermediate portion of the vertical conveyance device more apt to stand than before.
[0010]
That is, when the vertical transport device is configured to be vertically oscillatingly movable about a fulcrum at the rear portion thereof in order to adjust the handling depth, the holding rails in the stock-holding / conveying mechanism are vertically oscillated together. As shown in JP-A-8-19326 and the like, a downward-opening U-shaped pipe that bypasses the spike side of a transported grain culm is provided in a vertical transport device, and a front end of the pipe supports a holding rail.
[0011]
The location where the U-shaped pipe is installed is near the front and rear center of the vertical transport device, but at that point, the posture of the grain culm has already been shifted to the side, and the U-shaped pipe is used to pass over the inclined grain culm. Is forced to have a distorted shape with the upper part displaced considerably to the inside of the fuselage in the left and right direction, and because large diameter pipe material is used to compensate for the decrease in strength, the installation space is free. There were disadvantages in terms of degree and weight.
[0012]
On the other hand, in the configuration of the present invention, since the grain stalk posture at the U-shaped pipe arrangement location is more upright than before, the U-shaped pipe is set to have a straight U-shape with the upper part not inward. Thus, the arrangement space can be reduced, or the pipe diameter can be reduced, so that the weight can be reduced or the strength can be increased.
[0013]
Similarly , according to the configuration of claim 1 , the frame body is configured to have a symmetrical shape in which the front and rear in the transport direction have the same shape with respect to the middle position in the longitudinal direction, and each of the pair of front and back frame bodies is made of the same component. With this configuration, the upper and lower frames, or the upper and lower covers, made of sheet metal such as sheet metal that covers the upper and lower sides of the transport chain with locking claws can be used as common parts, reducing mold costs and reducing component types. It is possible to reduce the management cost by reducing the number.
[0014]
〔effect〕
In the grain culm transport structure of the combine according to claim 1 , the relatively short remodeling of changing the grain culm transport path from a straight line to a mountain shape by the ear hooking and transporting mechanism can suppress the delay of the ear tip and the turbulence due to the transport. As a result, a better and smoother cereal culm transport state can be obtained, and the rationalization of reducing the weight and improving the strength of the U-shaped pipe supporting the sandwiching rail can be achieved.
[0015]
The grain culm transport structure of the combine according to the first aspect has an advantage that the cost can be reduced by reducing the mold cost and the management cost of the upper and lower covers of the tip locking and transporting mechanism.
[0016]
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.
[0017]
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 pulling and transporting planted grain culm (cutted grain culm) cut by the cutting backward. Three first transporting devices 9, a pair of left and right second transporting devices 10 for transporting the harvested grain culm conveyed rearward while gathering the harvested grain culms conveyed to the left and right, and collecting the harvested grain culm gathered to the left and right central. It comprises a vertical transport device 11 that supplies and transports the rearward threshing device 3 while gradually changing the posture from the standing posture to the sideways posture, and a cutting frame 12 that supports them.
[0018]
As shown in FIGS. 3 and 4, each raising device 7 includes an erect raising case 7 a, a driving sprocket 7 b disposed on an upper part of the raising grain stem raising path side (inside) in the raising case 7 a, A driven sprocket 7c provided at a lower portion of the case 7a, a rotating chain 7d wound around the sprockets 7b and 7c, a fixed interval in a state in which the posture can be changed between the posture caused by the rotating chain 7d and the stored posture. And a tension sprocket 7f disposed 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 by this.
[0019]
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 these 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.
[0020]
The second transporting device 10 on the left side is provided with a clamping transport mechanism 10A and an upper and lower two-stage locking transport mechanism 10B. The clamping transport action of the clamping transport mechanism 10A and the locking of each locking transport mechanism 10B. The harvesting culm is collected and transported by the transport action. First, the holding and transporting mechanism 10A includes a driving sprocket 10a provided at the left end, a first driven sprocket 10b provided at the left and right central portions, and a driving sprocket 10a and a packer 9B in the first transporting device 9 on the left. It is composed of a deployed second driven sprocket 10c and a rotating chain with projection 10d wound around the sprockets 10a to 10c.
[0021]
The locking and conveying mechanism 10B includes a first driving sprocket 10e disposed above the driving pulley 9a in the first conveying device 9 on the left side, a first driven sprocket 10f disposed behind the driving sprocket 10e, and the sprockets 10e and 10f. 10g wound around the first rotating chain, a plurality of first locking and conveying claws 10h attached at regular intervals to the first rotating chain 10g, and a second drive arranged above the first driven sprocket 10f. A sprocket 10j, a second driven sprocket 10k disposed behind the sprocket 10, a second rotating chain 10m wound around the sprockets 10j and 10k, and a sprocket 10j attached at regular intervals to the second rotating chain 10m. And a plurality of second locking and conveying claws 10n.
[0022]
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. The transport device 9 includes a second driven sprocket 10c disposed between the driving pulley 9a and the packer 9B, and a rotating chain 10d with projections wound around the sprockets 10a to 10c. Only the clamping transport mechanism 10A is provided, and the gathering and transporting of the harvested culm is carried out by the clamping transport action of the clamping transport mechanism 10A.
[0023]
As shown in FIG. 1, FIG. 2, and FIG. 4, the vertical transport device 11 includes a stock-holding / conveying mechanism 11A and a tip-holding / conveying mechanism 11B. The feeding mechanism of the harvested grain culm is supplied and transported by the locking transport action of the transport mechanism 11B, 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 placed in the threshing device 3. It is leading.
[0024]
The stock-holding / conveying mechanism 11A is provided with a driving sprocket 11a provided at a rear portion on a left side, a first driven sprocket 11b provided on a left side thereof, and a first sprocket 10b provided on a second conveying device 10 on a right side. It is composed of two driven sprockets 11c, a chain with projections 11d wound around the sprockets 11a to 11c, and the like.
[0025]
The tip locking transport mechanism 11B includes a driving sprocket 11e (an example of a rear wheel) disposed above the driving sprocket 11a, and a driven roller 11f (a front wheel) disposed above a rear portion of the right first transporting device 9. Body), a rotating chain 11g wound around the sprocket 11e and the driven roller 11f (an example of an endless rotating band), and a plurality of members attached to the rotating chain 11g at regular intervals. It is composed of a stop claw 11h and the like.
[0026]
Since the tip locking transport mechanism 11B is configured to extend from above the rear part of the right first transport device 9 to the feed chain 3a of the threshing device 3, the front side portion thereof is connected to the right second transport device. It functions as the locking and transporting mechanism 10B for collecting and transporting the harvested grain culm.
[0027]
The structure of the tip locking and conveying mechanism 11B will be described in detail. As shown in FIGS. 16 to 19, the upper and lower frame members 75 and 76 made of sheet metal are overlapped and connected by bolts 77 to form a locking frame 80, which is driven so that the rotating chain 11g can be tensioned. The roller 11f is supported so as to be movable. A guide portion 79, which slides and guides a pair of sliding portions 78, 78 formed on the base side of the locking claw 11h, is formed integrally with the upper and lower frames 75, 76 by pressing. That is, on the grain culm transport side (left side), the locking claw 11h is in a protruding posture in which it stands up, and on the grain culm non-transport side (right side), the locking claw 11h is folded and moves in the locking frame 80. The shape of the guide portion 79 is set so as to be in the posture.
[0028]
Then, the movement trajectory Tr of the grain culm transport side portion of the rotating chain 11g in a plan view is formed into a mountain shape whose front and rear central portions protrude far away from a line connecting the driving sprocket 11f and the driven roller 11e. In addition, it is set to be symmetrical in the direction along the longitudinal direction of the tip locking and conveying mechanism 11B. Thus, the upper and lower frames 75 and 76 have a symmetrical shape as a component, and the upper and lower frames 75 and 76 can be formed of the same component.
[0029]
The vertical transport device 11 pivotally supports the reaping unit 2 with a vertically oscillating axis P (an example of a left-right fulcrum provided at the rear part) of the body of the reaping unit 2 and a coaxial core so as to be vertically oscillating. In addition, the handling depth of the threshing device 3 can be adjusted. That is, although not shown, a lifting drive source 82 such as a geared motor and a culm length detecting means 83 for detecting a tip position of a grain culm conveyed by the vertical conveying device 11 by a pair of contact sensors 83a, 83a and the like are provided. A handling depth control device 84 for operating the elevation drive source 82 based on the detection result of the culm length detecting means 83 so as to achieve a predetermined handling depth state is provided. This technique is a well-known technique already known in Japanese Patent Application Laid-Open No. Hei 6-14640, etc., and will not be described in detail.
[0030]
In the case of adopting the handling depth adjusting structure, the holding rail 11i and the tip guide 86, which make a pair with the chain 11d, are bypassed from the upper side via the stay 85 through the stay 85 in the stock holding mechanism 11A. A downwardly-facing U-shaped pipe 81 for supporting the vertical transport device 11 is provided, and the U-shaped pipe 81 is provided with the above-described culm length detecting means 83. The tip locking and transporting mechanism 11B has a mountain shape in plan view in which the front and rear central portions project to the left, and the transport route (movement trajectory) Tr of the tip locking and transporting mechanism 11B at the central portion is a stock origin. Since the transport path (movement trajectory) Ts of the nipping transport mechanism 11A is not so different from the horizontal position, the grain culm posture is relatively upright.
[0031]
Therefore, the U-shaped pipe 81 bypassing the transporting culm does not need to bend so that the upper part thereof is laid inside (right side) in the lateral direction of the machine, and may have a straight shape such that the U shape is simply turned upside down. It has become something.
[0032]
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, through which the power is transmitted to the raising device 7, the cutting device 8, the first transport device 9, the second transport device 10, and the vertical transport device 11 via the counter shaft 14. I have to.
[0033]
The transmission structure will be described in brief. As shown in FIGS. 1, 2 and 4 to 7, a main transmission extending forward and downward from the counter shaft 14 by interlocking with a bevel gear is provided at the left and right central portions of the counter shaft 14. The shaft 15 is mounted in a main frame 12F made of a thick pipe material. At the front end of the main transmission shaft 15, the left and right central portions of the first transmission shaft 16 facing left and right are provided, and at the left and right ends and the left and right central portions of the first transmission shaft 16, the corresponding lifting devices 7 are provided from the first transmission shaft 16. The lower end of the second transmission shaft 17 extending in the vertical direction is connected to the upper end of each second transmission shaft 17 by a corresponding drive shaft 7 g of the raising device 7 via a bevel gear 18.
[0034]
That is, the power input to the counter shaft 14 is transmitted to the respective raising devices 7 via the main transmission shaft 15, the first transmission shaft 16, and the second transmission shaft 17. As a result, power can be transmitted to each of the raising devices 7 without providing a power distribution shaft or the like that is laid across the drive shaft 7g provided on the upper portion of each of the raising devices 7. It is not necessary to provide a transmission case surrounding the frame, a decorative cover for improving the appearance, and the like at the top of each raising device 7, so that the structure can be simplified and the manufacturing cost can be reduced, and the position of the center of gravity can be reduced. Can be kept low, and the weight balance of the aircraft can be stabilized.
[0035]
In addition, since the spike side of the planted grain culm raised by each of the elevating devices 7 does not catch on the transmission case or the decorative cover covering the power distribution shaft or the like, there is a transport delay or entanglement of the spike side due to the catch. Therefore, it is possible to prevent the occurrence of a transport trouble such as a transport failure or a transport jam due to the above. In addition, as shown in FIG. 3, the space between the upper portions of the respective raising devices 7 is opened to improve the visibility of the weeding tools 6 and the like immediately before the raising devices 7 from the control unit 5. In addition, it is easy to perform a setting operation or the like for correctly positioning the combine with the planted grain stem to be cut.
[0036]
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. Of the lower shaft portions 17b, the left and right lower shaft portions 17b are directed toward the upper portions of the corresponding left and right raising devices 7, and the central lower shaft portion 17b is connected to the corresponding central raising device 7 Each is set at a right angle to the first transmission shaft 16 in a state heading downward.
[0037]
Of the upper shaft portions 17c, the left and right upper shaft portions 17c are tilted toward the center toward the corresponding drive shaft 7g of the left and right raising devices 7, and the central upper shaft portion 17c is In a state of being tilted 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.
[0038]
Of the lower shaft portions 17b, the drive sprockets 10a of the holding and conveying mechanism 10A of the corresponding second conveying 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.
[0039]
In the second transfer device 10 on the left side, the second driven sprocket 10c of the clamping transfer mechanism 10A and the first drive sprocket 10e of the lower locking transfer mechanism 10B are connected via the left packer 9B and the first rotating shaft 10p. And are connected so as to rotate together. Further, the first driven sprocket 10f of the lower locking transport mechanism 10B and the second driving sprocket 10j of the upper locking transport mechanism 10B are connected via a second rotating shaft 10q so as to rotate integrally. That is, in the second transfer device 10 on the left side, the power from the second transmission shaft 17 is transmitted to the upper and lower locking transfer mechanism 10B via the holding transfer mechanism 10A.
[0040]
The drive pulley 9a and the packer 9B in each of the left and right first transfer devices 9 are connected so as to rotate integrally with the second driven sprocket 10c of the pinching transfer mechanism 10A in the corresponding left and right second transfer device 10. On the other hand, the first transporting device 9 at the center is connected so that the driving pulley 9a and the packer 9B rotate integrally, and the packer 9B is meshed with the packer 9B of the first transporting device 9 on the right side. That is, the left and right corresponding second transfer devices 10 and the first transfer device 9 are linked and connected, and the right first transfer device 9 and the center first transfer device 9 are linked and connected to each other. Is transmitted to each first transfer device 9 via the second transfer device 10.
[0041]
As shown in FIGS. 1, 2, and 4, the vertical transport device 11 is configured to drive the stock-holding and transporting mechanism 11 </ b> A to a third transmission shaft 22 that is transmission-connected to a left end of the counter shaft 14 via a bevel gear 21. The sprocket 11a and the driving sprocket 11e of the tip 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 vertical transport device 11 via the third transmission shaft 22.
[0042]
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 formed of a casing that surrounds the transmission systems. Therefore, in the mowing frame 12, the left and right vertical axis cases 46 and 48, which are casings surrounding the lower shaft portions 17 b of the left and right second transmission shafts 17, are provided with the rotating chain 10 d with projections of the second transport device 10. An opening 12a that allows insertion is formed, and a rotating chain 10d with a projection is wound around the driving sprocket 10a mounted on the lower shaft portion 17b from the opening 12a.
[0043]
Next, a support structure of the first transfer device 9 will be described. As shown in FIG. 8, in each of the raking frames 43 to 45 supporting each of the first transporting devices 9, the rear side is a casing 46 to 48 surrounding the second transmission shaft 17, and the front side is a weeding tool. 6 is detachably attached to the raising device support frame 49 fixed to the weeding frame 12x supporting the unit 6 by bolting.
[0044]
The right right raking frame 43 includes a main pipe 51 whose front end is bolted to a stay 50 projecting rearward from the right raising device support frame 49, and a bracket 53 bolted to a right casing 48. The bracket 53 is provided with an auxiliary pipe 52 provided at a rear end thereof, and supports a transport cover 54 which is also a member constituting a transport path for the grain culm.
[0045]
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 for rotatably supporting the first driven pulley 10b of the right holding and transporting 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) covering the rotating belt 9c with projections from above is press-formed into a stepped shape to increase strength (see FIG. 9).
[0046]
As shown in FIGS. 10 and 11, the bracket 53 is made of a plate material bent in a U-shape in plan view, and straddles a joint portion of the front case portion 48 a and the rear case portion 48 b constituting the right casing 48. Thus, the two case portions 48a and 48b are jointly fastened and fixed with four bolts for connection. The rear end of the auxiliary pipe 52 bent downward is welded to the bracket 53.
[0047]
As shown in FIGS. 8 and 9, 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 left casing 46, and an auxiliary pipe 58 provided with the bracket 59 at a rear end thereof, and supports a transport cover 61 which is also a member constituting a transport route of the grain stalk. The structure is basically the same as that of the right raking frame 43.
[0048]
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. An auxiliary pipe 58 is provided to extend over a main bracket 57 and a left bracket 59 which has the same structure as the right bracket 53 and is fastened together by a connecting bolt between the front case part 46a and the rear case part 46b of the left casing 46. At the same time, a sheet metal guide 65 for forming a movement path of the rotating chain 10d with a protrusion is attached to the rear end of the main pipe 57 and the left bracket 59.
[0049]
As shown in FIGS. 8 and 12, the left and right center scraping frame 44 basically includes only a pipe frame 67 that is bolted to a pipe material casing 47 surrounding the left and right center upper shaft portion 17 c. 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 casing 47, and the front end of the transport cover 68 is raised from the left by the second raising device supporting frame. It is bolted to a stay 60 projecting backward from 49.
[0050]
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.
[0051]
As shown in FIG. 13 and FIG. 14, the mowing device 8 includes a cutting blade base 23 mounted over a plurality of weeding frames 12 x extending forward to mount the fixed weeding tools 6 on the mowing frame 12. It comprises a receiving blade 24 fixed thereto, a cutting blade 25 slidable left and right with respect to the receiving blade 24, and a knife head 27 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.
[0052]
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 end of the weeding frame 12x at the right end is bent to the left, 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.
[0053]
The cutting blade 25 and the mounting stay 26 are integrated with a rivet or the like together with a slider 31 which is a knife bar that is in sliding contact with the rear end surface of the receiving blade 24, and are tightened and fixed together with a knife clip 32 for holding the cutting blade 25. The plate 33 is configured to slide on the rear end surface 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.
[0054]
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 provided with the cutting blade crank 30 at the front end is supported in a front-rear direction with respect to a shaft supporting case portion 35a formed integrally with the casing 35 of the cutting transmission shaft 16, and its shaft core Q is It is located approximately at the center of the knife head 27 in the vertical direction.
[0055]
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.
[0056]
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.
[0057]
That is, the counter shaft 39 is rotatably supported on the second shaft support case portion 35b formed integrally with the casing 35 on the rear side of the shaft support case portion 35a, and the counter shaft 39 is engaged with the large-diameter bevel gear 37. The small-diameter bevel gear 41 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.
[0058]
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.
[0059]
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.
[0060]
As shown in principle in FIG. 15 (a), the weight 40a of the second balance weight 40 has an axis Q with the first balance weight 34 when the cutting blade 25 is in the middle of right and left reciprocation. The weight 40a is set so as to have a reciprocal positional relationship between the upper and lower sides with respect to the center and the same position in the up and down direction with respect to the bearing roller 29 while rotating in the reverse direction.
[0061]
Then, as shown in principle in FIG. 15B, at the moment when the cutting blade 25 reaches the end of the left and right reciprocating motion, the first balance weight 34 and the weight 40a of the second balance weight 40 are respectively. It is set on the same side in the left-right direction so as to move in opposite directions in the up-down direction, and with respect to the bearing roller 29, so as to be opposite to each other in the left-right direction. .
[0062]
Next, the structure of the connecting portion between the left and right vertical axis cases 46 and 48 and the cutting shaft 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.
[0063]
As shown in FIGS. 9 to 11, 13 and 14, a mowing shaft case 35 is bolted to a left side surface at a lower end portion of a cylindrical right vertical axis case 48 having a lower shaft portion 17 b therein. The cutting power transmission shaft 16 inserted from the flange portion 71, and bevel gears 18, 18 for interlocking connection between the cutting power transmission shaft 16 and the lower shaft portion 17b. The right vertical axis case 48 and the mowing shaft case 35 use four bolts 73 in a state where the relative posture is determined by the spigot portion 72 and the positioning means A fitted in the axial direction of the mowing transmission shaft 16. It is connected and integrated.
[0064]
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 12a are both formed so as to straddle both case portions 48a and 48b.
[0065]
As shown in FIGS. 11 and 16, the positioning means A has a fitting structure of the pin 69 of the right vertical case 48 and the hole 70 of the cutting shaft case 35, and the right vertical case 48 and the cutting shaft It is provided at a mating portion for connecting to the case 35. The cylindrical pin 69 is formed so as to be divided into a half portion 69a integrally formed with the front case portion 48a with the split surface w interposed therebetween and a half portion 69b integrally formed with the rear case portion 48b. , So as to protrude in the axial direction of the mowing transmission shaft 16.
[0066]
Incidentally, the reaping 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-right hole 70 of the lower case portion 35B is formed by machining. . The left vertical axis case 46 and the mowing shaft case 35 are also connected by four bolts 73 using the same positioning means A and spigot 72 as in the above-described structure.
[Brief description of the drawings]
FIG. 1 is a side view of a front part of a self-removable combine. FIG. 2 is a plan view showing a configuration of a reaper transport unit. FIG. 3 is a front view showing a configuration of a reaper transport unit. FIG. FIG. 5 is a plan view showing a pre-processing portion of the mowing section. 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 is a transmission of a second transfer device on the left side. FIG. 8 is a plan view showing the structure of each raking frame. FIG. 9 is a side view of a partially cut-away portion showing a left raking frame portion. FIG. 10 is a right raking frame. FIG. 11 is a front view of a partially cutaway showing a bracket portion; FIG. 11 is a front view of FIG. 10; FIG. 12 is a side view of a partially cutout showing a central raking frame portion; FIG. FIG. 14 is a side view of a partially cutaway. FIG. 14 is a plan view of a partially cutout showing a driving structure of a mowing device. FIG. 15 is a first and a second. FIG. 16 is a plan view showing a vertical transfer device. FIG. 17 is a system diagram showing an outline of a handling depth control device. FIG. 18 is a view showing the upper and lower frames of a tip locking transfer mechanism. FIG. 19 shows a structure of a locking frame, (A) is a sectional view, (B) is an assembly operation diagram, and FIG. 20 is an exploded perspective view of a main part showing a structure of a positioning means. ]
Reference Signs List 3 threshing device 11 vertical transport device 11A stock-holding and transporting mechanism 11B tip locking transporting mechanism 11e rear wheel 11f front wheel 11g endless rotating bands 75, 76 with locking claws Frame P left and right fulcrum

Claims (1)

The stem culm that is cut and gathered at the left and right middle points by the stock nip holding and conveying mechanism that nips and conveys the stock side and the head locking and conveying mechanism that locks and conveys the spike side. , Comprising a vertical transport device that transports toward the threshing device while changing to a reclining posture in which the tip side faces inward in the lateral direction of the machine,
The vertical transport device is pivotally supported pivotally about a left-right fulcrum provided in a rear portion thereof, and a change adjustment of a handling depth in the threshing device is configured,
Said tip locking transport mechanism, constituted by an endless rotating belt with locking claws wound over the front and rear of the wheel unit, a pair of front and rear frame for supporting it,
A guide portion that guides the sliding portion of the endless rotating band is formed in each of the frame bodies, and the portion of the guide portion located on the grain culm transport side of the endless rotating band is intermediate between its front and rear in plan view. The part is formed so as to have a mountain shape that protrudes far away from a line segment connecting the front and rear rings ,
The frame body is configured in a symmetric shape in which the front and rear in the transport direction have the same shape with the middle position in the longitudinal direction as a boundary,
With respect to the movement trajectory of the grain culm conveyance side portion of the endless rotation zone in plan view, the movement trajectory of the pinching action portion of the stock root holding and conveying mechanism in plan view is largely separated at the end of the conveyance path. Combine grain stalk transport structure with a stock-holding transport mechanism and an ear- locking transport mechanism .

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