JP6624633B2 - Combine - Google Patents

Description

  The present invention relates to a combine provided with a torque limiter.

  2. Description of the Related Art A combine provided with a central stock source transport mechanism, a right stock source transport mechanism, and a left stock source transport mechanism in a reaper has been conventionally known (see Patent Document 1). A central scraping mechanism is connected to the central stock transport mechanism, a right scraping mechanism is connected to the right stock transport mechanism, and a left scraping mechanism is further connected to the left stock transport mechanism.

  The right strainer transport mechanism transports the roots of the two right-hand grain culms, and transports the grain stems transported by the central strainer transport mechanism and the left strainer transport mechanism while joining them. First, the cereal culm conveyed by the central stanchion conveying mechanism is joined to the right stanchion conveying mechanism that conveys the stock of the two stems, and then the cereal culm conveyed by the left stanchion conveying mechanism. Are merged. Each scraping mechanism scrapes the stem of the grain stalk backward, and delivers the scraped grain stalk to each stock transport mechanism.

  Further, a torque limiter used for a scraping mechanism including a star wheel and a scraping belt is known (see Patent Document 2).

  The torque limiter described in Patent Literature 2 is a drive shaft that transmits power to a squeeze transport device as a squeeze mechanism, and is provided at a lower end portion of a shaft that faces vertically. The power of the engine as the drive unit is transmitted to the shaft via the transmission shaft, and the lower end of the shaft is connected to the front end of the transmission shaft inside the transmission case. A star wheel is mounted in the middle of the shaft, and a pulley for supporting the scraping belt is mounted on the upper end of the shaft.

JP 2008-11770 A Japanese Utility Model Publication No. 8-10256

  However, since the torque limiter is provided at the lower end of the shaft inside the transmission case, it is difficult for the operator to reach the torque limiter when performing maintenance on the torque limiter, and it is difficult to perform the work. Also, even if you try to maintain the torque limiter after removing the shaft from the transmission case, you can remove the pulley and star wheel attached to the upper end and the middle of the shaft from the shaft, or connect them to these. Parts need to be disassembled. Such an operation takes a great deal of time, and the weight of these parts connected to the shaft may force the operator to perform heavy labor.

  Further, such a torque limiter is used to cut off transmission of power to the central stock source transport mechanism among the central stock source transport mechanism, the right stock source transport mechanism, and the left stock source transport mechanism. And maintenance is particularly difficult. In other words, since the central stock transport mechanism and the central scraping mechanism are sandwiched between the left stock transport mechanism and the scraping mechanism, the working space is particularly limited.

  In view of the above, the present invention relates to a combiner provided with a torque limiter in a reaper, which cuts off transmission of power to a central stock transfer mechanism, a right stock transfer mechanism, and a left stock transfer mechanism. It is an object of the present invention to be able to easily maintain the camera.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

The invention according to claim 1 is a central stock transfer mechanism, a right stock transfer mechanism and a left stock transfer mechanism for gripping and transferring the root of the cut culm to the rear, and the central stock transfer mechanism, Combine equipped with a central rake mechanism, a right rake mechanism, and a left rake mechanism, which are connected to the right and left stock transport mechanisms, respectively, and rake the stock of the cereal stem backward. A vertical transmission shaft connected to the cutting input shaft, a horizontal transmission shaft connected to the vertical transmission shaft, an intermediate shaft connected to the horizontal transmission shaft, and a central shaft connected to the intermediate shaft; A middle transfer drive shaft that transmits power to the transfer mechanism and the central scraping mechanism, and when a load of a predetermined amount or more is applied to the central stock transfer mechanism or the central scraping mechanism on the intermediate shaft, the Transmission of power to the central stock transfer mechanism and the central scraping mechanism A torque limiter for sectional provided, and vertical transmission case for accommodating the longitudinal transmission shaft, the longitudinal transmission case further comprising a connection to the split pipe fitting, and the intermediate shaft and the horizontal transmission axis of said split pipe fittings Internally connected, the intermediate shaft protrudes upward from the split pipe joint, the torque limiter is provided at a protruding end of the intermediate shaft, and a top cover that covers the protruding end of the intermediate shaft and the torque limiter. Is what is covered .

The invention according to claim 2 further comprises a bossed drive wheel having a shaft hole through which the intermediate shaft passes, and the bossed drive wheel protruding upward from the split pipe joint together with the intermediate shaft passing through the shaft hole. A top end of the intermediate shaft and a projecting end of the intermediate shaft, and the top cover covers the projecting end of the intermediate shaft, the upper end of the bossed drive wheel, and the shear pin. .

  The present invention has the following effects.

  According to the first aspect of the present invention, by providing the torque limiter on the intermediate shaft, when performing maintenance on the torque limiter, the central stock transport mechanism and the central scraping mechanism connected to the middle transport drive shaft are used. Since there is no need to remove from the transport drive shaft or disassemble the central stock transport mechanism and the central scraping mechanism, maintenance can be easily performed.

Further , since the projecting end of the intermediate shaft and the torque limiter are covered by the top cover, it is possible to prevent the grain stem from being caught on the intermediate shaft including the torque limiter. Further, by removing the top cover, the torque limiter provided on the intermediate shaft can be easily maintained.

According to the second aspect of the invention, by removing the top cover, it is possible to easily maintain the torque limiter including replacement of the shear pin.

It is a side view of a combine. It is a top view of a combine. It is a schematic side view of the reaping part of a combine. It is an outline top view showing a cutting frame, a conveyance device, and a raking device in a cutting part of a combine. It is a block diagram which is a structure of a mowing part and which shows the mechanism which transmits the power of an engine. FIG. 3 is a schematic plan view illustrating a lower transfer device and a scraping device among the transfer devices. FIG. 7 is a schematic side view showing a central stock transfer mechanism of the lower transfer device and a left-side scraping mechanism of a pair of central scraping mechanisms of the scraping device as viewed from an arrow VII illustrated in FIG. 6. . FIG. 5 is a plan view showing a central stock transport mechanism of a lower transport device and a left-side sweeping mechanism of a pair of central sweeping mechanisms of the sweeping device. (A) is a schematic plan view showing a pair of central scraping mechanisms when stalking a grain stem, and (B) is a left scraping mechanism rotated about a middle conveyance drive shaft with respect to a right scraping mechanism. It is an outline top view of a central scraping mechanism showing a position. It is a perspective view which shows the split pipe joint connected to a vertical transmission case. It is a perspective view showing the state where the top cover of the storage case attached to the upper surface of the split pipe joint was removed. FIG. 11 is a sectional view taken along line XII-XII shown in FIG. 10.

  Hereinafter, the combine 1 of the present invention will be described.

  FIG. 1 is a side view of the combine 1. FIG. 2 is a plan view of the combine 1. In the following, the direction of arrow A shown in FIG. 1 is defined as the forward direction of the traveling direction. FIG. 1 shows the front-back direction and the up-down direction of the combine 1. FIG. 2 illustrates the front-back direction and the left-right direction of the combine 1.

  The combine 1 includes a traveling unit 2, a cutting unit 3, a threshing unit 4, a feed chain 5, a Glen tank 6, a discharge auger 7, an operation unit 8, and an engine 9.

  The traveling unit 2 has a traveling body 2a and a crawler 2b. The pair of right and left crawlers 2b supports the traveling machine body 2a. The cutting unit 3 is a part for cutting the grain stalk in the combine 1. The reaper 3 is provided at the front of the traveling body 2a. As described later, the cutting unit 3 of the combine 1 has a configuration for 6-row cutting.

  The threshing unit 4 is a part of the combine 1 that separates grains from the ears of the grain culm. The threshing unit 4 is provided above the traveling machine body 2a. The feed chain 5 provided in the threshing unit 4 conveys the grain stalk backward while grasping the root of the grain stalk during threshing. The Glen tank 6 is for storing grains after threshing and sorting in the combine 1. The Glen tank 6 is provided on the side of the threshing unit 4.

  The discharge auger 7 is for discharging the grains stored in the Glen tank 6 to the outside. The discharge auger 7 has a cylindrical shape. The discharge auger 7 shown in the figure is in a state of being accommodated in the combine 1 and lies in a range from the rear of the Glen tank 6 to the left front part of the combine 1.

  Next, the reaper 3 will be described with reference to FIGS. 3, 4 and 5.

  The cutting unit 3 includes a cutting frame 10, a raising device 31, a weeding plate 32, a cutting blade 33, a scraping device 34, and a transport device 35.

  As shown in FIG. 3, at the tip of the cutting unit 3, seven weeding boards 32 for six rows are provided. The tip of each weed plate 32 is pointed, and the rear has a rounded shape. Each weed board 32 separates the culm to be cut from the culm left in the field, and separates the culm to be cut for each strip.

  The raising device 31 causes the culm separated by the weeds 32 in each row. The raising device 31 has six raising cases 61 for six lines. Further, each raising case 61 supports a tine-added chain 62 so as to be rotatable. Each raising case 61 is located behind the weeding board 32. Each raising case 61 is inclined rearward so that its rear end is higher than its front end, and is arranged at appropriate intervals along the left-right direction. As shown in FIG. 5, the raising device 31 includes raising tines S1, S2, S3, S4, S5, and S6 for raising uncut kernels of each line. Each raising tine S1,..., S6 is provided in each raising case 61.

  The scraping device 34 scrapes the root of the grain stem caused by the raising device 31. The rake device 34 has a first rake mechanism Rk1, a second rake mechanism Rk2, and a third rake mechanism Rk3. These first to third scraping mechanisms Rk1 to Rk3 are inclined rearward so that the front side is disposed below the rear side, and are arranged at appropriate intervals along the left-right direction. As shown in FIG. 3, the scraping device 34 is disposed behind the raising device 31.

  The cutting device including the cutting blade 33 is provided below the raking device 34. The cutting blade 33 cuts the six rows of grain stalks C1 to C6 scraped by the scraping device 34.

  The cutting frame 10 includes a cutting input case 11, a vertical transmission case 12, a horizontal transmission case 13, a plurality of weeding frames 14, a drive pipe 15, a raised vertical transmission case 16, a vertically connected frame (not shown), and a raised horizontal transmission case. 17, a plurality of raising drive cases 18 and a middle transport drive case 20. Each of these cases is a metal pipe member and has a hollow shape.

  The reaping input case 11 is lying in front of the threshing unit 4 along the left-right direction. A pair of left and right mounting tables 83 is provided above the crawler 2b. A split pipe joint 84 is provided above each mounting table 83. Left and right ends of the reaping input case 11 are rotatably and detachably attached to the upper portions of the mounting tables 83 via split pipe joints 84.

  The vertical transmission case 12 is connected to an intermediate portion of the reaping input case 11 such that the front end of the vertical transmission case 12 is located below the rear end. The axial direction of the vertical transmission case 12 is substantially orthogonal to the axial direction of the reaping input case 11.

  The front end of the vertical transmission case 12 is connected to an intermediate portion of the horizontal transmission case 13. The axis direction of the horizontal transmission case 13 is substantially parallel to the axis direction of the reaping input case 11 and substantially orthogonal to the axis direction of the vertical transmission case 12.

  The weeding frame 14 is composed of six pipes and seven pipe members. Each tube member of the weeding frame 14 is arranged at appropriate intervals along the left-right direction. The weeding frame 14 faces in the front-back direction. The weeding board 32 is attached to the front end of each weeding frame 14 such that the tip of each weeding board 32 faces forward.

  A drive pipe 15 is connected below the weeding frame 14. By connecting the respective pipe members of the weeding frame 14 by the drive pipe 15, seven pipe members for six lines constitute the weeding frame 14 integrally. The drive pipe 15 is located on the lower front side of the horizontal transmission case 13, and is bridged between the left end pipe member and the right end pipe member of the weeding frame 14 in the left-right direction.

  The raised vertical transmission case 16 is connected to the left end of the horizontal transmission case 13. The raised vertical transmission case 16 stands in a forwardly inclined posture such that the upper end of the raised vertical transmission case 16 is located forward of the lower end. The axial direction of the raised vertical transmission case 16 is oriented vertically.

  On the other hand, a vertical connection frame is connected to the right end of the horizontal transmission case 13 (not shown). The axis direction of the vertical connection frame is oriented in the up-down direction.

  The raised horizontal transmission case 17 is bridged between the upper end of the raised vertical transmission case 16 and the upper end of the vertical connection frame along the left-right direction. The raising drive case 18 is connected to the raising horizontal transmission case 17. The raising drive case 18 is constituted by six pipe members for six lines. The axial direction of each pipe member of the raising and lowering drive case 18 is oriented in the up-down direction. Each pipe member is arranged at predetermined intervals along the left-right direction. The upper end of each pipe member is connected to the raised lateral transmission case 17. In a plan view or a front view of the combine 1, each raising case 61 is arranged between each weeding frame 14 and between each raising driving case 18. Each raising case 61 is supported by the rear lower lower weeding frame 14 and the rear upper raising driving case 18.

  The middle transport drive case 20 is connected to an intermediate portion of the lateral transmission case 13. The middle transfer drive case 20 stands in a forwardly inclined posture such that the upper end of the middle transfer drive case 20 is located forward of the lower end. The axial direction of the middle transport drive case 20 is more greatly inclined than the vertically raised vertical transmission case 16 with respect to the vertical direction.

  The middle transport drive case 20 supports a central stock transport mechanism BC of the lower transport device B and a left scraping mechanism R2L of the second scraping mechanism Rk2 together with a support frame 85 from below, which will be described later. The support frame 85 is connected to the weeding frame 14 via a bracket 86.

  Above the middle transport drive case 20, an upper transport drive case 21 is provided. The axial direction of the upper transport drive case 21 points obliquely upward and forward, and substantially coincides with the axial direction of the middle transport drive case 20. The upper end of the middle transport drive case 20 and the lower end of the upper transport drive case 21 are connected to a transmission case 22 that houses a power transmission mechanism 30 described below. A support pipe 23 is provided between the central stock transport mechanism BC and the center tip transport mechanism UC.

  Furthermore, the mowing frame 10 includes an upper center frame 19. The upper center frame 19 faces in the front-rear direction, and is connected to the reaping input case 11. The front end of the upper center frame 19 is connected to the middle part of the raised horizontal transmission case 17, and the rear end is connected to the middle part of the cutting input case 11. The upper center frame 19 is located above the vertical transmission case 12. The upper center frame 19 is located above the scraping device 34 and the transport device 35.

  The combine 1 includes a hydraulic cylinder 36. The hydraulic cylinder 36 is connected to the traveling machine body 2a and the vertical transmission case 12 such that the front end of the hydraulic cylinder 36 is located above the rear end. The mowing unit 3 rotates around the mowing input case 11 by the expansion and contraction of the hydraulic cylinder 36. Due to this rotation, the reaper 3 moves up and down.

  Next, the first rake mechanism Rk1, the second rake mechanism Rk2, and the third rake mechanism Rk3 will be described as the rake devices 34 with reference to FIGS.

  The first rake mechanism Rk1 as the right rake mechanism is a rake mechanism of the rake device 34 arranged on the rightmost side. The first scraping mechanism Rk1 scrapes the roots of the right two grain culms (the first and second grain culms C1 and C2 counted from the right) of the six grain culms. The first scraping mechanism Rk1 includes a pair of left and right star-shaped scraping wheels ST1 and ST2, and a pair of left and right projecting scraping belts BL1 and BL2.

  The first rake mechanism Rk1 has a right rake mechanism and a left rake mechanism. The right scraping mechanism includes a right scraping wheel ST1, a right scraping belt BL1, a large-diameter pulley P11, a small-diameter pulley Ps1, and a rotating shaft G1 (see FIG. 6). The left scraping mechanism includes a left scraping wheel ST2, a left scraping belt BL2, a large-diameter pulley P12, a small-diameter pulley Ps2, and a rotating shaft G2 (see FIG. 6).

  The second sweeping mechanism Rk2 as the central sweeping mechanism is a sweeping mechanism arranged on the left side of the first sweeping mechanism Rk1 of the sweeping device 34. The second scraping mechanism Rk2 scrapes the roots of the two central grain culms (the third and fourth grain culms) of the six grain culms. The second scraping mechanism Rk2 includes a pair of left and right scraping wheels ST3 and ST4 each having a star shape, and a pair of left and right scraping belts BL3 and BL4 each having a projection.

  The second sweeping mechanism Rk2 has a right sweeping mechanism R2R and a left sweeping mechanism R2L. The right scraping mechanism R2R includes a right scraping wheel ST3, a right scraping belt BL3, a large-diameter pulley P13, a small-diameter pulley Ps3, and a rotating shaft G3 (see FIG. 6). The left scraping mechanism R2L includes a left scraping wheel ST4, a left scraping belt BL4, a large-diameter pulley P14, a small-diameter pulley Ps4, and a rotating shaft G4 (see FIG. 6).

  The right scraping wheel ST3 is fixed to the rotation axis G3 so as to be rotatable around the rotation axis G3. The rotation axis G3 is inclined forward with respect to the vertical direction such that the upper end thereof is located forward of the lower end, and the right scraping wheel ST3 is inclined backward. The left scraping wheel ST4 is fixed to the rotation axis G4 so as to be rotatable around the rotation axis G4. The rotation axis G4 is inclined forward with respect to the vertical direction such that the upper end thereof is located forward of the lower end, and the left scraping wheel ST4 is inclined backward. The rotation axis G3 and the rotation axis G4 are substantially parallel. The right scraping wheel ST3 and the left scraping wheel ST4 are arranged so as to be adjacent to each other along the left-right direction, and mesh with each other.

  The right rake wheel ST3 is located on the left side of the left rake wheel ST2 of the first rake mechanism Rk1, and is arranged to be adjacent to the rake wheel ST2 in the left-right direction. That is, the right scraping wheel ST3 is arranged so as to be sandwiched between the left scraping wheel ST4 on the left side and the left scraping wheel ST2 on the right side. Then, the right scraping wheel ST3 is engaged with the left scraping wheel ST4.

  The large-diameter pulley P13 is arranged above the right scraping wheel ST3, and is fixed to the rotation shaft G3. The small-diameter pulley Ps3 is disposed on the right front of the large-diameter pulley P13, and is provided rotatably with respect to the mowing frame 10. The right scraping belt BL3 is wound around a large-diameter pulley P13 and a small-diameter pulley Ps3.

  The large-diameter pulley P14 is disposed above the left scraping wheel ST4, and is fixed to the rotation shaft G4. The small-diameter pulley Ps4 is disposed on the right front of the large-diameter pulley P14, and is provided rotatably with respect to the mowing frame 10. The left scraping belt BL4 is wound around a large-diameter pulley P14 and a small-diameter pulley Ps4.

  The right scraping belt BL3 and the left scraping belt BL4 are arranged so as to be adjacent to each other along the left-right direction, and are arranged in a stretched state substantially along the front-back direction. The distance between the belt surfaces facing each other, that is, the distance between the left outer surface of the right scraping belt BL3 and the right outer surface of the left scraping belt BL4 gradually decreases from the front to the rear.

  The third rake mechanism Rk3 as the left rake mechanism is a rake mechanism arranged on the left side of the second rake mechanism Rk2 of the rake device 34, that is, the leftmost rake mechanism. The third scraping mechanism Rk3 scrapes the roots of the two left cereals (the fifth and sixth cereals) out of the six cereals. The third scraping mechanism Rk3 includes a pair of left and right scraping wheels ST5 and ST6 each having a star shape, and a pair of left and right scraping belts BL5 and BL6 each having a projection.

  The third rake mechanism Rk3 has a right rake mechanism and a left rake mechanism. The right scraping mechanism includes a right scraping wheel ST5, a right scraping belt BL5, a large-diameter pulley P15, a small-diameter pulley Ps5, and a rotating shaft G5 (see FIG. 6). The left scraping mechanism includes a left scraping wheel ST6, a left scraping belt BL6, a large-diameter pulley P16, a small-diameter pulley Ps6, and a rotating shaft G6 (see FIG. 6).

  The front surfaces of the scraping belts BL1, BL2, BL3, BL4, BL5, and BL6 are covered with belt covers Bc1, Bc2, Bc3, Bc4, Bc5, and Bc6. Of the rotation shafts G1, G2, G3, G4, G5, and G6, the rotation shafts G1, G4, and G6 receive power and rotate. Therefore, the scraping wheels ST1, ST4, ST6 fixed to the rotating shafts G1, G4, G6 and the scraping belts BL1, BL4, BL6 are driven according to the power. On the other hand, the scraping wheels ST2, ST3, ST5 and the scraping belts BL2, BL3, BL5 fixed to the rotating shafts G2, G3, G5 rotate by receiving the rotation of the scraping wheels ST2, ST3, ST5.

  Accordingly, when the right scraping wheel ST1 rotates counterclockwise in plan view, the left scraping wheel ST2 rotates clockwise. Further, when the left scraping wheel ST4 rotates clockwise in plan view, the right scraping wheel ST3 rotates counterclockwise. Further, when the left scraping wheel ST6 rotates clockwise in plan view, the right scraping wheel ST5 rotates counterclockwise. The rotation of the scraping wheels ST1, ST2, ST3, ST4, ST5, and ST6 causes the scraping belts BL1, BL2, BL3, BL4, BL5, and BL6 to rotate, and the scraping device 34 scrapes the grain stem rearward and upward. Put in.

  The power used in the combine 1 is not limited to the output of the engine 9 but may be the output of another configuration such as an electric motor.

  Next, the transport device 35 will be described. Hereinafter, the direction in which the grain culm is transported is referred to as a “transport direction”. Further, the upstream means a side closer to the cutting blade 33 in the transport direction. Downstream means closer to the threshing unit 4 in the transport direction and farther from the cutting blade 33.

  The transport device 35 transports the cut grain culm to the threshing unit 4. As shown in FIG. 4, the transport device 35 includes a lower transport device B, an upper transport device U, a vertical transport device V, an auxiliary transport device S, and a tip transport device T.

  The lower conveying device B conveys the harvested grain stem to the rear upper direction while gripping the root of the culm to the vertical conveying device V. The lower transfer device B includes a right stock transfer mechanism BR, a center stock transfer mechanism BC, and a left stock transfer mechanism BL. The central stock source transport mechanism BC is located between the left stock source transport mechanism BL and the right stock source transport mechanism BR.

  As shown in FIG. 6, an intermediate junction X1 and a final junction X2 are formed in the lower transport device B. The intermediate junction X1 and the final junction X2 are located on the outward path of the right stock source transport mechanism BR. The intermediate junction X1 is formed at a position close to the central stock former transport mechanism BC. The final junction X2 is formed at a position close to the left stock source transport mechanism BL.

  The intermediate junction X1 faces the final point on the outward route of the central stock transport mechanism BC. The intermediate junction X1 is located downstream from the transport start end of the right stock source transport mechanism BR. In the intermediate junction X1, the third and fourth cereals are added to the base of the two cereals. The final junction X2 faces the final point on the outward path of the left stock former transport mechanism BL. The final junction X2 is located downstream of the intermediate junction X1. In the final junction X2, the fifth and sixth grain culms are added to the base of four grain culms.

  The right-side stock transfer mechanism BR includes a two-row grain culm that is conveyed from the central stock transport mechanism BC to the right two-row grain culm scraped by the first scraping mechanism Rk1. , And the roots of the cereal stems for two rows conveyed from the left-side root conveying mechanism BL are joined, and the roots of the cereal stems for six rows are conveyed rearward and upward while grasping the vertical conveying device V. . The driven sprocket Sn1 of the right side stock transfer mechanism BR is fixed to the rotation axis G1 of the first scraping mechanism Rk1.

  The right stock transfer mechanism BR includes a transfer chain H1, a driven sprocket Sn1 fixed to the rotating shaft G1, a driving sprocket Sv1, floating pulleys R1a and R1b provided on the left and right sides of the driving sprocket Sv1, and a driving sprocket Sv1. And a tension pulley PT1 provided on the right front side of the vehicle. The transport chain H1 is wound around the driven sprocket Sn1, the driving sprocket Sv1, the floating pulleys R1a and R1b, and the tension pulley PT1. In this way, the right stock transfer mechanism BR is connected to the right scraping mechanism of the first scraping mechanism Rk1.

  The central stock root transport mechanism BC transports the stock roots of the grain culms of the two central rows raked by the second scraping mechanism Rk2 rearward and upward while gripping it to the intermediate junction X1. The central stock source transport mechanism BC is disposed behind the second scraping mechanism Rk2 and at the right front of the left stock source transport mechanism BL. The transport start end of the central stock transport mechanism BC is located above the left scraping wheel ST4, and the transport end is located to the right rear of the transport start end. The central stock former transport mechanism BC is inclined backward so that its front end is located below the rear end (see FIG. 3). The drive sprocket Sv2 of the central stock transport mechanism BC is fixed to the rotation shaft G4 of the second scraping mechanism Rk2 so as not to rotate relatively. That is, the rotating shaft G4 supports the driving sprocket Sv2 so as not to rotate relatively.

  The central stock transport mechanism BC includes a transport chain H2, a driving sprocket Sv2 fixed to the rotating shaft G4, a driven sprocket Sn2 provided behind the driving sprocket Sv2, and a floating provided to the right of the driven sprocket Sn2. It has a pulley R2a, a floating pulley R2b provided in front left of the driven sprocket Sn2, and a tension pulley PT2 provided in front of the floating pulley R2b. The transport chain H2 is wound around a driving sprocket Sv2, a floating pulley R2a, a driven sprocket Sn2, a floating pulley R2b, and a tension pulley PT2. In this way, the central stock transfer mechanism BC is connected to the left-side scraping mechanism R2L of the second scraping mechanism Rk2.

  In addition, the endless belt-shaped body of the central stock transport mechanism BC is not limited to the transport chain H2, but includes a drive pulley as a drive wheel supported by the rotation shaft G4 so as to be relatively non-rotatable, a lower frame 90a and an upper frame 90b. It may be a belt with a projection that is wound around a driven pulley that is rotatably supported on the driven pulley.

  The left stock former transport mechanism BL transports the stock of two left-handed grain stalks squeezed by the third scraping mechanism Rk3 upward and rearward while gripping the stem to the final junction X2. The transport start end of the left stock source transport mechanism BL is located above the left scraping wheel ST6, and the transport end is located to the right rear of the transport start end. The left stock former transport mechanism BL is inclined backward so that its front end is located below the rear end. The driven sprocket Sn3 of the left stock former transport mechanism BL is fixed to the rotation axis G3 of the third scraping mechanism Rk3.

  The left stock transfer mechanism BL includes a transfer chain H3, a driven sprocket Sn3 fixed to the rotating shaft G6, a driving sprocket Sv3, and two floating pulleys R3a and R3b provided to the right rear of the driving sprocket Sv3. And a tension pulley PT3 provided in front of the driving sprocket Sv3. The transport chain H3 is wound around the driven sprocket Sn3, the driving sprocket Sv3, the idle pulleys R3a and R3b, and the tension pulley PT3. In this way, the left stock former transport mechanism BL is connected to the left scraping mechanism of the third scraping mechanism Rk3.

  The right-side stock former transport mechanism BR first transports two rows (first and second rows) of grain culms, and adds two central rows of grain culms at the intermediate junction X1 and transports them to the final junction. . Then, the right-side stock transport mechanism BR adds two left-handed grain culms to four-handed grain culms at the final junction X2. Then, the grain stalks of six rows that have passed through the final junction X2 are transported to the feed chain 5 via the vertical transport device V shown in FIG.

  The vertical transport device V transports the root of the six-rowed grain culm inherited from the terminal end of the transport route of the right-side root transport mechanism BR to the rear upward while holding the auxiliary to the auxiliary transport device S. As shown in FIG. 3, the vertical transport device V is located rearward of the lower transport mechanism B, and is inclined backward so that its front end is located below its rear end. The front end of the vertical transfer device V is located near the end of the transfer path of the lower transfer mechanism B, and the rear end is positioned diagonally to the left of the front end and forward of the feed chain 5.

  The auxiliary transport device S transports the roots of the six-row grain culm inherited from the terminal end of the transport route of the vertical transport device V to the threshing unit 4 (see FIG. 1). The auxiliary transport device S is disposed above and behind the vertical transport device V. The front end of the auxiliary transfer device S is located near the end of the transfer path of the vertical transfer device V, and the rear end is located rearward and higher than the front end.

  The upper conveying device U conveys the ears of the grain stem conveyed by the lower conveying device B. The upper transfer device U is located rearward and upper than the lower transfer device B and above the vertical transfer device V, and is inclined backward so that the front end of the upper transfer device U is located below the rear end. As shown in FIG. 4, the upper conveying device U conveys the right ear tip transport mechanism UR that transports the ears of the two right-side grain culms C1 and C2, and the ear tip of the central two-row grain culm C3 and C4. It includes a central tip transport mechanism UC and a left tip transport mechanism UL that transports the tips of the two left-hand grain culms C5 and C6.

  The tip transport device T transports the tip of the grain stalks of six rows transported by the right stock source transport mechanism BR, the vertical transport device V, and the auxiliary transport device S. The ear tip transport device T is disposed above and behind the upper transport device U. The front end of the tip transfer device T is located in the middle of the transfer path of the upper transfer device U, and the rear end is located rearward and higher than the front end.

  Next, a configuration for transmitting the power output from the engine 9 in the reaper 3 will be described with reference to FIGS. In FIG. 7, the transmission case 22 is shown in cross section.

  Each of the pipes and the like constituting the mowing frame 10 (see FIG. 4) accommodates a shaft for transmitting power to the mowing unit 3 having a driving function. The reaping input case 11 (see FIG. 4) accommodates a reaping input shaft 41 (see FIG. 5). The axial direction of the cutting input shaft 41 is substantially parallel to the left-right direction. An input pulley 40 (see FIG. 5) to which the power of the engine 9 is input is fixed to a left end portion of the cutting input shaft 41, and a vertical transmission shaft 42 is connected to a middle portion of the cutting input shaft 41.

  The vertical transmission shaft 42 is housed in the vertical transmission case 12 (see FIG. 4). The axis of the vertical transmission shaft 42 is oriented in the front-rear direction. As shown in FIG. 5, the rear end of the vertical transmission shaft 42 is connected to the cutting input shaft 41 via a bevel gear. The front end of the vertical transmission shaft 42 is connected to an intermediate portion of the horizontal transmission shaft 43 via a bevel gear. The lateral transmission shaft 43 is housed in the lateral transmission case 13 (see FIG. 4). The axial direction of the lateral transmission shaft 43 is substantially parallel to the left-right direction.

  The power taken out of the middle part of the vertical transmission shaft 42 is transmitted to the drive sprocket Sv1 of the right stock source transport mechanism BR. By the rotation of the driving sprocket Sv1, the transport chain H1 of the right stock source transport mechanism BR is driven between the driving sprocket Sv1 and the driven sprocket Sn1. Then, the right scraping wheel ST1 starts rotating about the rotation axis G1 to which the driven sprocket Sn1 is fixed. Thereby, the right-side rake mechanism of the first rake mechanism Rk1 is driven, and the left-side rake mechanism is driven.

  The power taken out from the left end of the horizontal transmission shaft 43 is transmitted to the drive sprocket Sv3 of the left stock former transport mechanism BL. The rotation of the drive sprocket Sv3 drives the transfer chain H3 of the left stock former transfer mechanism BL between the drive sprocket Sv3 and the driven sprocket Sn3. Then, the left scraping wheel ST6 starts rotating about the rotation axis G6 (see FIG. 6) to which the driven sprocket Sn3 is fixed. As a result, the left rake mechanism of the third rake mechanism Rk3 is driven, and the right rake mechanism is driven.

  The power taken from the left end of the lateral transmission shaft 43 is transmitted to the left ear tip transport mechanism UL. The power taken out of the longitudinal transmission shaft 42 is transmitted to the right ear tip transport mechanism UR and the vertical transport device V. The power taken out of the cutting input shaft 41 from the middle part is transmitted to the auxiliary conveyance device S and the tip conveyance device T.

  The power taken out of the intermediate portion of the horizontal transmission shaft 43 is transmitted to the central stock transport mechanism BC and the central tip transport mechanism UC via the output mechanism 50. The output mechanism 50 includes an intermediate shaft 38 connected to the lateral transmission shaft 43 by engagement of the bevel gear 37a and the bevel gear 37b, an intermediate conveyance drive shaft 48 connected to the intermediate shaft 38, and an intermediate conveyance drive shaft 48 from the intermediate shaft 38. And a transmission belt BL9 for transmitting power to the power transmission belt. The middle transport drive shaft 48 has a longer shaft length than the intermediate shaft 38. The middle transport drive shaft 48 housed in the middle transport drive case 20 (see FIG. 3) has an axis centering obliquely upward and forward. Power is transmitted from the intermediate shaft 38 to the middle transport drive shaft 48 by a transmission belt BL9 as an endless belt.

  An intermediate shaft 38 is connected to an intermediate portion of the lateral transmission shaft 43 by meshing a bevel gear 37a and a bevel gear 37b. A drive pulley 39a for rotating the transmission belt BL9 is attached to the intermediate shaft 38 so as not to rotate relatively. The rotational force of the intermediate shaft 38 and the drive pulley 39a is transmitted to the middle transport drive shaft 48 via the transmission belt BL9. The driven pulley Sn9 of the transmission belt BL9 is attached to the middle transport drive shaft 48 so as not to rotate relatively. By the power transmitted from the intermediate shaft 38 via the transmission belt BL9, the driven pulley Sn9 rotates integrally with the intermediate conveyance drive shaft 48.

  As described above, the intermediate shaft 38 provided between the horizontal transmission shaft 43 and the middle conveyance drive shaft 48 changes the rotation speed, and transmits power from the horizontal transmission shaft 43 to the middle conveyance drive shaft 48. You. The intermediate shaft 38, the middle transport drive shaft 48, and the transmission belt BL9 constitute an output mechanism 50 that transmits power to the central stock transport mechanism BC and the second scraping mechanism Rk2 as the central scraping mechanism. ing.

  The endless belt-shaped body is not limited to the transmission belt BL9, but may be a chain wound around a driving sprocket fixed to the intermediate shaft 38 and a driven sprocket fixed to the middle conveyance driving shaft 48.

  The rotational force of the middle transport drive shaft 48 is transmitted to the power transmission mechanism 30. Specifically, a drive sprocket Sp1 of the power transmission mechanism 30 is fixed to an intermediate portion of the middle transport drive shaft 48 so as not to rotate relatively. The rotation of the intermediate conveyance drive shaft 48 and the drive sprocket Sp1 is transmitted to the driven sprocket Sp2 via the transmission chain H7. The transmission chain H7 is wound around the driving sprocket Sp1 and the driven sprocket Sp2.

  In the reaping unit 3, the drive sprocket Sp1, the driven sprocket Sp2, and the transmission chain H7 constitute a power transmission mechanism 30 from the middle transport drive shaft 48 to the central stock transport mechanism BC and the left scraping mechanism R2L. In the power transmission mechanism 30, power is transmitted to the driven sprocket Sp <b> 2 via the driving sprocket Sp <b> 1 that receives the rotational force of the middle conveyance drive shaft 48 and the transmission chain H <b> 7. The power transmission mechanism 30 is housed in the transmission case 22 (see FIG. 3).

  The driven sprocket Sp2 of the power transmission mechanism 30 is fixed to the rotation shaft G4 (see FIG. 6) so as not to rotate relatively, and the driving sprocket Sv2 of the central stock feed mechanism BC and the large-diameter pulley P14 of the left scraping mechanism R2L are connected to each other. It is fixed to the rotation axis G4 so as not to rotate relatively. Therefore, the rotation shaft G4, the drive sprocket Sv2 of the central stock transport mechanism BC, and the left scraping mechanism R2L are driven by the power transmitted from the middle transport drive shaft 48 via the transmission chain H7 and the driven sprocket Sp2 in the power transmission mechanism 30. The large diameter pulley P14 and the driven sprocket Sp2 of the power transmission mechanism 30 rotate integrally.

  The transport chain H2 of the central stock transport mechanism BC is driven between the drive sprocket Sv2 and the driven sprocket Sn2 by the rotation of the drive sprocket Sv2. Then, the rotation of the driving sprocket Sv2 of the central stock transport mechanism BC and the rotation of the large-diameter pulley P14 of the left scraping mechanism R2L causes the left scraping wheel ST4 to start rotating about the rotation axis G4 (see FIG. 6). Thereby, the left-side rake mechanism R2L of the second rake mechanism Rk2 is driven. The right side sweeping mechanism R2R is driven by the driving of the left side sweeping mechanism R2L of the second sweeping mechanism Rk2.

  In the central stock transport mechanism BC, the drive sprocket Sv2 is located at the start end side of the transport outward path. On the other hand, the floating pulley R2a is located at the end side of the transport forward path in the central stock transport mechanism BC, and faces the intermediate junction X1 (see FIG. 6). That is, power is transmitted from the middle transport drive shaft 48 to the transport start end of the central stock transport mechanism BC via the power transmission mechanism 30. The transport start end in the central stock transport mechanism BC here refers to the vicinity of a portion of the drive sprocket Sv2 facing the right-side rake mechanism R2R of the second rake mechanism Rk2. On the other hand, the terminating end of transport in the central stock transport mechanism BC refers to the vicinity of the floating pulley R2a.

  On the other hand, tension is applied to the transport return path of the central stock transport mechanism BC by the tension pulley PT2. As shown in FIG. 8, a tension coil spring 70 connected to a tension arm 80 is used for the tension by the tension pulley PT2. The tension arm 80 is fixed to the upper transport drive case 21 via a bracket 79 so as not to rotate relatively. A bracket 79 provided integrally with the tension arm 80 is fixed to the upper transport drive case 21 by welding. The upper transport drive case 21 is rotatably connected to the transmission case 22.

  A clevis 78 with a rod is provided at one end 81 on the spring receiving side of the tension arm 80. The pulley shaft SP of the tension pulley PT2 is fixed to the other end 82 on the pulley operation side of the tension arm 80. The pulley shaft SP is supported by an inner ring of a radial bearing (not shown) provided on the tension pulley PT2 so that the tension pulley PT2 can rotate freely with respect to the pulley shaft SP. The tension pulley PT2 is located inside the wheel of the transport chain H2.

  A rib 97 as a spring base is provided on the upper frame 90b of the central stock transfer mechanism BC so as to be relatively immovable. A hook 71 at one end of the coil spring 70 is hooked by a hole formed in the rib 97 and is supported by the upper frame 90b. A plate 77 is formed at the tip of the rod of the clevis 78, and the hook 72 at the other end of the coil spring 70 is hooked in a hole formed in the plate 77. Thus, the upper frame 90b and the tension arm 80 support the coil spring 70.

  The tension arm 80 can rotate around the middle conveyance drive shaft 48 by the elastic force of the coil spring 70. When the coil spring 70 pulls the clevis 78 and the tension arm 80 in the compression direction, the tension arm 80 including the bracket 79 rotates around the middle transfer drive shaft 48 together with the upper transfer drive case 21. Due to this rotation, the tension pulley PT2 presses the transport chain H2 from inside to outside of the wheel of the transport chain H2, and tension is applied to the transport chain H2.

  As shown in FIG. 3, the transmission case 22 is located above and in front of the left scraping wheel ST4, and is located below and behind the central stock transport mechanism BC. As shown in FIG. 8, even if a part of the transport forward path of the transport chain H2 is formed along the right side surface of the transmission case 22, the right side surface of the transmission case 22 is located to the right of the transport path. Not. That is, the transmission case 22 and the power transmission mechanism 30 are configured such that the transmission case 22 does not interfere with the transport of the grain culm. At a position that does not cross the outbound path.

  As shown in FIG. 7, the transmission case 22 is provided in parallel with the left scraping wheel ST4. Specifically, the rotation plane of the transmission chain H7 inside the transmission case 22 is parallel to the rotation plane of the left scraping wheel ST4. Further, the rotation plane of the transmission chain H7 is parallel to the rotation plane of the left scraping belt BL4 and the rotation plane of the transport chain H2 of the central stock transport mechanism BC, and is orthogonal to the rotation axis G4 and the middle transport drive shaft 48. ing.

  The transmission case 22 is formed of a metal such as a steel material. The transmission case 22 includes an upper case and a lower case. Thus, the transmission case 22 has a box shape including the upper surface 22a and the lower surface 22b as well as the left, right, front and rear side surfaces. The transmission case 22 is supported by the cutting frame 10 including the support frame 85, and is also supported by the cutting frame 10 including the lateral transmission case 13 via the middle conveyance drive shaft 48 and the middle conveyance drive case 20. That is, the upper transport drive case 21 including the middle transport drive shaft 48, the middle transport drive case 20, the transmission case 22, and the support frame 85 constitute a rigid body as one strong structural member.

  Since the lower end of the rotating shaft G4 is supported by the transmission case 22 of this rigid body, the rotating shaft G4 can rotate stably, and further, the left scraping belt BL4 and the left scraping wheel ST4 stably. Can work. Further, by receiving the stable operation of the left scraping mechanism R2L including the left scraping belt BL4 and the left scraping wheel ST4, the right scraping mechanism R2R can operate stably. In the central stock transport mechanism BC, the driving sprocket Sv2 supported by the rotating shaft G4 can rotate stably, so that the rotation of the transport chain H2 is stabilized. In this way, according to the configuration of the structural member including the transmission case 22, the second sweeping mechanism Rk2 as the central sweeping mechanism and the central stock transport mechanism BC can be operated stably.

  The lower surface 22b of the transmission case 22 is parallel to the left scraping wheel ST4. The left scraping wheel ST4 is provided immediately below the lower surface 22b of the transmission case 22 so that the surface of the left scraping wheel ST4 is arranged along the lower surface 22b. That is, there is almost no gap between the left scraping wheel ST4 and the lower surface 22b of the transmission case 22, and the gap between the left scraping wheel ST4 and the lower surface 22b of the transmission case 22 is, for example, left It is smaller than the thickness of the included wheel ST4 and smaller than the thickness of the belt cover Bc4. Accordingly, the lower surface 22b of the transmission case 22 can scrape off mud and the like adhering to the left scraping wheel ST4 by the rotation of the left scraping wheel ST4. That is, the transmission case 22 can function as a scraper for the left scraping wheel ST4. Further, the transmission case 22 has a guide function of conveying the cereal stem along the side surface of the transmission case 22, and prevents the bundle of the cereal stem from overlapping in the central stock transport mechanism UC. Therefore, it is possible to stabilize the transport performance of the grain culm in the central stock transport mechanism UC.

  The configuration of power transmission in the transmission case 22 is not limited to the configuration including the chain H7 and the sprockets Sp1 and Sp2, but includes a configuration in which shafts on which belts and pulleys, gears or splines are formed are connected, and a pair of spur gears. Alternatively, a configuration in which power is transmitted by meshing between different types of gears, or a configuration using a combination of at least two of these may be used.

  As shown in FIG. 5, the center-ear-end transport mechanism UC includes a driving pulley Pv1, a driven pulley Py1, and a pulley Py2. The drive pulley Pv1 is fixed to the upper end of the middle transport drive shaft 48 so as not to rotate relatively. As shown in FIG. 7, the middle transport drive shaft 48 penetrates through the transmission case 22 and protrudes upward.

  The drive sprocket Sp1 of the power transmission mechanism 30 is attached to a portion of the middle transport drive shaft 48 that penetrates the lower surface of the transmission case 22 and is housed in the transmission case 22. Further, in a portion above the portion where the drive sprocket Sp <b> 1 is attached, the middle transport drive shaft 48 protrudes upward from the upper surface of the transmission case 22. The protruding end of the middle transport drive shaft 48 penetrates through the lower frame 91 of the center tip transport mechanism UC, and the drive pulley Pv1 of the center tip transport mechanism UC is attached to the protruding end so as to be relatively non-rotatable. . The portion between the upper end portion and the intermediate portion of the middle transport drive shaft 48 is housed in the upper transport drive case 21. A portion above the portion accommodated in the upper transport drive case 21 passes through the lower frame 91.

  The rotating shaft G4 penetrates through the belt cover Bc4 so as to be rotatable relative to the belt cover Bc4 above the central stock transport mechanism BC, and a headed bolt is attached to the penetrated upper end. On the other hand, the driven sprocket Sp2 of the power transmission mechanism 30 is attached to the rotation shaft G4 below the portion where the drive sprocket Sv2 of the central stock transfer mechanism BC is attached, so that it cannot rotate relatively. The driven sprocket Sp2 is housed in the transmission case 22. The portion below the portion where the driven sprocket Sp <b> 2 is attached projects downward from the transmission case 22. Further, a left scraping wheel ST4 is attached to the lower end of the rotating shaft G4 so as not to rotate relatively. That is, the rotating shaft G4 supports the left scraping wheel ST4 so as to be relatively non-rotatable below the drive sprocket Sv2 of the central stock transport mechanism BC.

  The driven pulley Py1 of the center tip transport mechanism UC is rotatably supported by the lower frame 91 and the upper frame 92 behind the drive pulley Pv1. In addition, the pulley Py2 of the center tip transport mechanism UC is relatively rotatably supported by the lower frame 91 and the upper frame 92 in front of the drive pulley Pv1. The driven sprocket Sn2 of the central stock transport mechanism BC is rotatably supported by the lower frame 90a and the upper frame 90b below the driven pulley Py1 of the center tip transport mechanism UC.

  In the center tip transport mechanism UC, a scraping belt BL8 with a projection is wound between the driving pulley Pv1, the driven pulley Py1, and the pulley Py2. Power is transmitted to the center tip transport mechanism UC from the middle transport drive shaft 48 via a drive pulley Pv1.

  Note that, in the center tip transport mechanism UC, the drive pulley Pv1 forms a part of the transport return path, and operates to pull the terminal end of the transport outward path. As described above, since the scraping belt BL8 is prevented from being loosened by the operation of the driving pulley Pv1, the center tip transport mechanism UC stably moves the tip side of the grain stalk to the tip transport apparatus T by the scraping belt BL8. Can be transported.

  A raised vertical transmission shaft 46 is connected to the left end of the horizontal transmission shaft 43 via a bevel gear. The raising vertical transmission shaft 46 is housed in the raising vertical transmission case 16. The raising horizontal transmission shaft 47 is connected to the upper end of the raising vertical transmission shaft 46 via a bevel gear. The raising lateral transmission shaft 47 is housed in the raising horizontal transmission case 17.

  A plurality of raising drive shafts 59 are connected to the raising horizontal transmission shaft 47 via bevel gears. The raising tine driving shaft 57 is connected to each raising driving shaft 59 via a bevel gear. The raising tine drive shaft 57 is inserted into the raising drive case 18. The lower end of the raising tine drive shaft 57 projects from the lower end of the raising drive case 18.

  A driving sprocket 58 used for driving the raising tines S1,..., S6 of the raising case 61 is fixed to the lower end of each raising tine drive shaft 57. Each drive sprocket 58 is supported by winding the upper part of each chain with tine 62. Raised tines S1,..., S6 are attached to the tine-added chains 62, respectively.

  Power is transmitted from the horizontal transmission shaft 43 to the driving sprocket 58 of each raising case 61 via the raising vertical transmission shaft 46, the raising horizontal transmission shaft 47, the raising driving shaft 59, and the raising tine driving shaft 57. A raising transmission mechanism 60 is incorporated in the middle of the raising vertical transmission shaft 46. The driving speed of the raising tines S1,..., S6 of each raising case 61 is switched by the raising transmission mechanism 60. In addition, the power taken out from the lateral transmission shaft 43 is transmitted to the cutting blade 33.

  The cereal stems C1 to C6 which are scraped backward by the scraping device 34 are cut by the cutting blade 33. The grain culms C1 and C2, the grain culms C3 and C4, and the grain culms C5 and C6 after cutting are conveyed to the threshing unit 4 while joining each other in the conveying device 35. In the transport device 35, the roots of the grain culms C1 to C6 are transported by the lower transport device B, the vertical transport device V, and the auxiliary transport device S, and the heads are transported by the upper transport device U and the ear tip transport device T.

  Next, the rotation of the left rake mechanism R2L of the second rake mechanism Rk2 as the central rake mechanism will be described with reference to FIGS.

  The transmission case 22 and the power transmission mechanism 30 are configured to be rotatable with respect to the mowing frame 10 (see FIG. 4) about the middle transport drive shaft 48. Further, the left-side scraping mechanism R2L moves the transmission case 22 and the power transmission mechanism 30 with respect to the reaping frame 10 including the support frame 85 together with the front extension frame 87 with the rotation about the middle conveyance drive shaft 48. It is configured to be able to rotate.

  As shown in FIG. 7, in the left scraping mechanism R2L, the front extension frame 87 strongly supports the belt cover Bc4, the small-diameter pulley Ps4, and the left scraping belt BL4 upward. The left scraping mechanism R2L is supported by the cutting frame 10 including the middle transport drive case 20 and the support frame 85 via the transmission case 22. The front extension frame 87 is provided between the transmission case 22 that supports the rotation shaft G4 and the belt cover Bc4, and is connected thereto.

  The rotation shaft G4 is supported by the transmission case 22 so as to be relatively rotatable. Outer rings of bearings 121 and 122 provided on the ceiling side and the bottom side of the transmission case 22 are supported by the transmission case 22. The inner ring of the bearing 121 and the inner ring of the bearing 122 are supported on the rotating shaft G4. The transmission case 22 is supported by the mowing frame 10 from below by being fixed to the support frame 85 via a lock mechanism (not shown).

  The upper transport drive case 21 that accommodates a part of the upper side of the middle transport drive shaft 48 is connected to the lower frame 91 and the transmission case 22 of the center tip transport mechanism UC. The transmission case 22 is supported by a support frame 85 from below. The support frame 85, the middle transfer drive case 20, the middle transfer drive shaft 48, the transmission case 22, the belt cover Bc4, and the front extension frame 87 are formed as a single rigid body by a central stock transfer mechanism BC and a left scraping mechanism R2L. I support it.

  A support pipe 23 is provided between the central stock transport mechanism BC and the center tip transport mechanism UC. The support pipe 23 is connected to the lower frame 91 of the center tip transport mechanism UC and the upper frame 90b of the central stock transport mechanism BC. The center tip transport mechanism UC is supported by the upper frame 90b of the central stock transport mechanism BC via the support pipe 23 in addition to the middle transport drive shaft 48 and the upper transport drive case 21.

  The lower end of the support pipe 23 is fixed to the upper frame 90b of the central stock transport mechanism BC. The upper end of the support pipe 23 is fixed to the lower frame 91 of the center tip transport mechanism UC.

  The transmission case 22 is configured to be rotatable with respect to the middle conveyance drive shaft 48. An outer ring of a bearing 123 provided on the ceiling side of the transmission case 22 and an outer ring of a bearing 124 provided on the bottom surface side are supported by the transmission case 22. The inner ring of the bearing 123 and the inner ring of the bearing 124 are supported by the middle conveyance drive shaft 48. Thereby, the transmission case 22 and the power transmission mechanism 30 can rotate with respect to the middle conveyance drive shaft 48.

  At the same time as the rotation of the transmission case 22 and the power transmission mechanism 30, the left scraping mechanism R2L including the rotation axis G4 rotates. As described above, the transmission case 22, the power transmission mechanism 30, and the left scraping mechanism R2L including the belt cover Bc4 and the rotation shaft G4 can rotate integrally with the support frame 85. Further, with the rotation of the rotation shaft G4 and the left side scraping mechanism R2L, the drive sprocket Sv2 attached to the rotation shaft G4 rotates around the middle conveyance drive shaft 48, so that the central stock transport mechanism BC can also rotate.

  The transmission case 22 and the power transmission mechanism 30 can be manually rotated. For example, an operation lever (not shown) and the above-described lock mechanism are provided on the left side surface of the transmission case 22. When the operator operates the operation lever, the restriction on the rotation of the transmission case 22 by the lock mechanism is released. As a result, the transmission case 22 and the power transmission mechanism 30 shift to a state in which the transmission case 22 and the power transmission mechanism 30 can freely rotate with respect to the intermediate conveyance drive shaft 48.

  When the operator pushes and pulls the transmission case 22, the transmission case 22 and the power transmission mechanism 30 rotate. Further, due to the rotation of the transmission case 22 and the power transmission mechanism 30, the left scraping mechanism R2L rotates around the middle conveyance drive shaft 48 with the movement of the rotation shaft G4. As described above, with the rotation of the transmission case 22 and the power transmission mechanism 30 about the middle conveyance drive shaft 48, the belt cover Bc4, the left scraping wheel ST4, the large-diameter pulley P14, the small-diameter pulley Ps4, and The left scraping mechanism R2L including the left scraping belt BL4 can rotate with respect to the cutting frame 10 including the support frame 85 together with the front extension frame 87.

  As shown in FIG. 9 (A), when the combine 1 operates to scrape the grain stem, the pitch circle P1 of the left scraping wheel ST4 and the pitch circle P2 of the right scraping wheel ST3 are in contact. No gap is formed between the pitch circles P1 and P2 (that is, the gap Ga is zero). This allows the right scraping wheel ST3 to rotate in response to the rotation of the left scraping wheel ST4.

  On the other hand, as shown in FIG. 9B, the rotation of the left rake mechanism R2L causes the right rake mechanism R2R in the second rake mechanism Rk2 such that a predetermined gap Gb is generated between the pitch circles P1 and P2. Can be separated from the left side scraping mechanism R2L. Further, by rotating the drive sprocket Sv2 of the central stock transfer mechanism BC together with the rotation axis G4, the distance between the transfer start end of the transfer chain H2 (see FIG. 6) and the right stock transfer mechanism BR can be increased. Therefore, in the second scraping mechanism Rk2, the grain stalk clogged between the respective scraping mechanisms can be easily removed.

  Alternatively, an electric motor (not shown), the engine 9, or the like may be used as the power for rotating the transmission case 22, the power transmission mechanism 30, and the left scraping mechanism R2L.

  For example, a drive shaft of a motor that rotates the transmission case 22 and the power transmission mechanism 30 is connected to the transmission case 22. The rotation of the motor causes the transmission case 22 and the power transmission mechanism 30 to rotate with respect to the middle conveyance drive shaft 48.

  In addition, about the center head conveyance mechanism UC, the structure which rotates with the center stock transfer mechanism BC may be sufficient, and the structure which does not rotate by rotation of the center stock transfer mechanism BC may be sufficient. For example, the lower end of the support pipe 23 is fixed to the upper frame 90b of the central stock transport mechanism BC via a lock mechanism (not shown). When the transmission case 22 and the power transmission mechanism 30 are rotated, by releasing the lock by the lock mechanism, the lower end of the support pipe 23 can be fixed to the upper frame 90b. This allows the center tip transport mechanism UC to stay at the original position independently of the rotation of the central stock transport mechanism BC.

  The combine 1 is configured so that the raising device 31 can rotate. The raising drive case 18 and the raising case 61 rotate upward about the raising horizontal transmission case 17.

  Regarding the rotation of the raising drive case 18 and the raising case 61, all of the six sections may be configured to rotate, and the raising drive case 18 and the raising case 61 on the left end, and the raising drive case 18 and the raising case 61 on the right end may be rotated. The configuration may be such that four sections except for the above are rotated.

  Alternatively, the raising drive case 18 and the raising case 61 may be configured to rotate around a vertical axis provided at either the left end or the right end in the raising device 31. Alternatively, the opening device 31 may be provided with a double door configuration at any position between the raising tine S1 and the raising tine S6.

  By exposing the scraping device 34 in front of the combine 1 with the rotation of the raising device 31, the operator can eliminate the clogging of the grain stalks of the lower transport device B, the scraping device 34, and the like as described above.

  Next, the torque limiter 140 provided on the intermediate shaft 38 of the output mechanism 50 will be described with reference to FIGS. As described above, power is transmitted to the horizontal transmission shaft 43 accommodated in the horizontal transmission case 13 from the vertical transmission shaft 42 accommodated in the vertical transmission case 12 (see FIGS. 4 and 5). As shown in FIG. 10, the lateral transmission case 13 includes a left case 13a and a right case 13b. A split pipe joint 113 is connected to the vertical transmission case 12. A left case 13a and a right case 13b are connected to the left and right of the split pipe joint 113, respectively. The above-described bevel gear 37a and bevel gear 37b (both shown in FIG. 5) are housed in a split pipe joint 113.

  The housing case 130 is attached to the upper surface of the split pipe joint 113 with a plurality of bolts. The storage case 130 includes a belt case 131 and a belt cover 132. The belt cover 132 covers the upper part of the belt case 131. The drive pulley 39a, the transmission belt BL9, and the driven pulley Sn9 (all shown in FIG. 5) are housed in a space surrounded by the belt case 131 and the belt cover 132.

  As shown in FIG. 12, a shaft hole 138 through which the intermediate shaft 38 penetrates is formed in the bottom surface 137 of the belt case 131. The lower end 38c of the intermediate shaft 38 is connected to the lateral transmission shaft 43 (see FIG. 5) inside the split pipe joint 113. The bevel gear 37a (see FIG. 5), which is non-rotatably mounted on the intermediate portion of the lateral transmission shaft 43, meshes with the bevel gear 37b, which is non-rotatably attached to the lower end 38c. The intermediate shaft 38 is exposed inside the belt case 131 through the shaft hole 138. A boss-mounted pulley 39 including a driving pulley 39a is attached to an outer periphery of a middle portion of the intermediate shaft 38.

  The outer ring of the radial bearing 145 is supported by the shaft hole 138. A recess 146 is formed in the shaft hole 138, and the outer ring of the bearing 145 is fitted into the recess 146. A retaining ring 147 for restricting the downward movement of the bearing 145 is provided below the bearing 145. The inner ring of the bearing 145 is supported by the intermediate shaft 38. Therefore, the intermediate shaft 38 receiving power from the lateral transmission shaft 43 can freely rotate with the bevel gear 37b with respect to the belt case 131.

  As shown in FIG. 10, a tubular portion 134 that forms the lower end of the middle transport drive case 20 is formed on the upper surface of the belt cover 132 in the storage case 130. The middle transport drive shaft 48 is housed inside the cylindrical portion 134 extending obliquely forward and upward from the upper surface of the belt cover 132. The lower end of the middle conveyance drive shaft 48 is disposed inside the belt case 131, and a driven pulley Sn9 (refer to FIG. 5) around which the transmission belt BL9 is wound is attached to the lower end so as to be relatively non-rotatable.

  The middle transport drive shaft 48 can freely rotate with respect to the storage case 130. A concave portion for supporting an outer ring of a bearing (not shown) is formed on a bottom surface (not shown) of the belt case 131, and an inner ring of the bearing is supported by a lower end portion of the middle conveyance drive shaft 48. A driven pulley Sn9 is provided above the bearing, and another bearing (not shown) is provided above the driven pulley Sn9. The inner ring of the upper bearing is supported at an intermediate portion of the middle conveyance drive shaft 48, and a concave portion for supporting the outer ring of the bearing is formed on a ceiling surface (not shown) of the belt cover 132.

  As shown in FIG. 11, a shaft hole 136 is formed in the belt cover 132. The shaft hole 136 extends from the ceiling surface inside the belt cover 132 to the upper surface 135. The shaft hole 136 and the cylindrical portion 134 are formed side by side in the belt cover 132. A pulley 39 with a boss projects together with the intermediate shaft 38 above the shaft cover 136 and above the belt cover 132. Each of these protruding ends is covered by a top cover 133 (see FIG. 10). The top cover 133 is detachably attached to the upper surface 135 of the belt cover 132 by a plurality of bolts (see FIGS. 10 and 11).

  A torque limiter 140 is provided at a protruding end of the intermediate shaft 38 protruding above the belt cover 132. More specifically, at the protruding end of the intermediate shaft 38, a torque limiter 140 configured by an upper end 39d as a protruding end of the bossed pulley 39 and a shear pin 141 is provided. The sheer pin 141, the protruding end of the intermediate shaft 38, and the protruding end of the bossed pulley 39 are covered by a top cover 133. That is, the top cover 133 has a protruding end of the intermediate shaft 38 projecting obliquely upward and forward from the split pipe joint 113 (specifically, obliquely upward and forward of the storage case 130 from the split pipe joint 113) and an upper end of the pulley 39 with a boss. Cover 39 d and the torque limiter 140.

  A boss-equipped pulley 39 as a boss-equipped drive wheel having a substantially cylindrical shape is provided on the outer periphery of the intermediate shaft 38 so as to be able to rotate integrally with the intermediate shaft 38. As shown in FIG. 12, the boss-mounted pulley 39 has a shaft hole 39b through which the intermediate shaft 38 penetrates, and includes a disk-shaped drive pulley 39a. The bossed pulley 39 is mounted along the outer periphery of the intermediate shaft 38 so that the axis of the bossed pulley 39 substantially matches the axis C38 of the intermediate shaft 38. The drive pulley 39a around which the transmission belt BL9 (see FIG. 5) is wound is formed below and integrally with the pulley 39 with the boss.

  The inner ring of the radial bearing 142 is supported by the boss 39c above the portion where the drive pulley 39a is formed. The outer ring of the bearing 142 is supported by the belt cover 132 so as not to rotate relatively. That is, the bossed pulley 39 is supported by the belt cover 132 so as to be relatively rotatable. A thrust bearing 143 is attached to the boss 39c above the bearing 142.

  A pin hole 39e and a concave portion 39f are formed in the upper end 39d of the bossed pulley 39. The pin hole 39e passes through the axis of the boss-mounted pulley 39 (that is, the axis C38 of the intermediate shaft 38) and penetrates two places of the boss 39c. The concave portion 39f is formed by cutting such that the outer surface of the upper end portion 39d is depressed inward. The recess 39f is formed in a substantially circular shape along the outer periphery of the upper end 39d, and the pin hole 39e crosses the recess 39f orthogonally to the axis of the bossed pulley 39.

  The shaft hole 39b through which the intermediate shaft 38 passes is formed from the upper end to the lower end of the pulley 39 with a boss. The intermediate shaft 38 vertically passes through the bossed pulley 39 through the shaft hole 39b. The upper end of the intermediate shaft 38 is located above the upper end of the pulley 39 with boss. A pin hole 38b is formed in an upper end 38a as a protruding end of the intermediate shaft 38. The pin hole 38b passes through the intermediate shaft 38 through the axis C38 orthogonally to the axial direction of the intermediate shaft 38.

  By inserting the shear pin 141 into the pin hole 38b of the intermediate shaft 38 and the pin hole 39e of the pulley 39 with a boss, a torque limiter 140 is provided at the upper end 38a of the intermediate shaft 38. The shear pin 141 passes through the upper end 39 d of the bossed pulley 39 and the upper end 38 a of the intermediate shaft 38. With such a configuration, the torque limiter 140 is provided on the intermediate shaft 38 of the output mechanism 50 (see FIG. 5) including the intermediate shaft 38, the intermediate conveyance drive shaft 48, and the transmission belt BL9.

  Further, by inserting the shear pin 141 into the pin hole 38b of the intermediate shaft 38 and the pin hole 39e of the pulley 39 with the boss, the pulley 39 with the boss can rotate integrally with the intermediate shaft 38. As the bossed pulley 39 and the intermediate shaft 38 rotate as a unit, as shown in FIG. 5, power is transmitted from the horizontal transmission shaft 43 to the middle conveyance drive shaft 48 via the transmission belt BL9. Of the pulleys 39 with bosses through which the intermediate shaft 38 passes through the shaft hole 39b, the drive pulley 39a is housed in the housing case 130 together with the transmission belt BL9.

  As shown in FIG. 12, a retaining ring 144 is attached to the concave portion 39f of the pulley 39 with the boss in order to prevent the shear pin 141 from dropping off. As described below, in the case of replacing the shear pin 141 or the like, the shear pin 141 can be pulled out from the pin holes 38b and 39e after removing the retaining ring 144 from the outer periphery of the pulley 39 with the boss. In FIG. 11, the illustration of the retaining ring 144 is omitted for convenience of illustration of the shear pin 141.

  The operation of the torque limiter 140 is as follows. In the case where clogging or the like of a grain stem occurs in the central stock transfer mechanism BC or the second scraping mechanism Rk2 (both are shown in FIG. 6), a predetermined amount is added to the central stock transport mechanism BC or the second scraping mechanism Rk2. The above load is applied. In such a case, the rotation of the transport chain H2 (see FIG. 6) is reduced, so that the rotation of the middle transport drive shaft 48 (see FIG. 5) and the pulley 39 with the boss are changed to the horizontal transmission shaft 43 (see FIG. 5). And the rotation of the intermediate shaft 38 which receives power from the motor. That is, the rotation of the boss-mounted pulley 39 is limited with respect to the input torque from the intermediate shaft 38. As a result, a shearing force is applied to the shear pin 141 that restricts the relative rotation between the upper end 38a of the intermediate shaft 38 and the upper end 39d of the bossed pulley 39. Then, when a shear force greater than the load resistance is applied to the shear pin 141, the shear pin 141 breaks, and the intermediate shaft 38 idles with respect to the boss-mounted pulley 39.

  The rotation of the intermediate shaft 38 with respect to the bossed pulley 39 causes the rotational torque of the bossed pulley 39 and the transmission belt BL9 to be lost, so that the transmission of power to the middle conveyance drive shaft 48 is interrupted. In this way, when a load equal to or more than a predetermined amount is applied to the central stock former transport mechanism BC or the second scraping mechanism Rk2, the torque limiter 140 causes the central stock former transport mechanism BC and the second scraping mechanism as the central scraping mechanism. Power transmission to the insertion mechanism Rk2 (see FIG. 6).

  In the reaper 3 of the combine 1, by removing the top cover 133 from the upper surface 135 of the belt cover 132, the maintenance of the torque limiter 140 including replacement of the shear pin 141 can be easily performed. As described above, the top cover 133 covers the upper end 38a as the protruding end of the intermediate shaft 38, the upper end 39d as the protruding end of the cylindrical rotating body, and the shear pin 141. When the top cover 133 is removed as shown in FIG. 11, the upper end 38a of the intermediate shaft 38 (see FIG. 12) and the upper end 39d of the bossed pulley 39 are exposed from the housing case 130. Further, a shear pin 141 penetrates through the pin holes 38b and 39e formed in the upper ends 38a and 39d. Then, by removing the retaining ring 144 fitted in the concave portion 39f of the bossed pulley 39, the shear pin 141 can be easily pulled out from the pin holes 38b and 39e in a state where the shear pin 141 is exposed to the outside from the housing case 130. .

  The torque limiter 140 provided on the intermediate shaft 38 is not limited to the configuration using the shear pin 141, and may be another known configuration used for the torque limiter, such as a clutch having an overrunning clutch mechanism. Good. The top cover 133 only needs to be configured to cover such a torque limiter.

  The configuration of the cutting section 3 of the combine 1 according to the present invention is also applicable to the configuration of 5-row cutting or 7-row cutting. Specifically, the cutting section for five-row cutting can be applied to a configuration in which power is transmitted to one central scraping mechanism. On the other hand, with regard to the cutting section of the seven-row cutting, one or both of the three central scraping mechanisms that transmit power to each of the scraping mechanisms connected to the two central stock source transport mechanisms are provided. Can be applied.

DESCRIPTION OF SYMBOLS 1 Combine 12 Vertical transmission case 13 Horizontal transmission case 13a Left case 13b Right case 38 Intermediate shaft 38a Upper end (projecting end)
38b Pin hole 39 Pulley with boss (Drive wheel with boss)
39a Drive pulley 39b Shaft hole 39d Upper end 39e Pin hole 41 Cutting input shaft 42 Vertical transmission shaft 43 Lateral transmission shaft 48 Medium transfer drive shaft 50 Output mechanism 113 Split pipe joint 130 Housing case 133 Top cover 135 Top surface 140 Torque limiter 141 Shear pin B Lower transfer device BC Central stock transfer mechanism BL Left stock transfer mechanism BR Right stock transfer mechanism BL9 Power transmission belt (endless belt)
Rk2 Second scraping mechanism (central scraping mechanism)
Sn9 driven pulley

Claims (2)

A central strainer transport mechanism, a right strainer transport mechanism and a left strainer transport mechanism for gripping and transporting the stem of the cut culm to the rear,
The central stock transfer mechanism, the right stock transfer mechanism and the left stock transfer mechanism, respectively connected, the central scraping mechanism to scrape the stem of the grain stem backward, the right scraping mechanism and the left scraping mechanism. In the combine equipped with the reaper,
A vertical transmission shaft connected to the reaping input shaft;
A horizontal transmission shaft connected to the vertical transmission shaft,
An intermediate shaft connected to the lateral transmission shaft,
An intermediate transport drive shaft connected to the intermediate shaft and transmitting power to the central stock transport mechanism and the central scraping mechanism,
A torque limiter that cuts off transmission of power to the central stock transport mechanism and the central scraping mechanism when a load of a predetermined amount or more is applied to the central stock transport mechanism or the central scraping mechanism on the intermediate shaft. the provided
A vertical transmission case accommodating the vertical transmission shaft,
Further comprising a split pipe joint connected to the vertical transmission case,
The intermediate shaft and the lateral transmission shaft are connected inside the split pipe joint,
The intermediate shaft projects upward from the split pipe joint,
The torque limiter is provided at a protruding end of the intermediate shaft,
A combine , wherein a top cover covers a protruding end of the intermediate shaft and the torque limiter . Further provided is a bossed drive wheel having a shaft hole through which the intermediate shaft passes,
An upper end portion of the boss-equipped drive wheel protruding upward from the split pipe joint together with the intermediate shaft penetrating the shaft hole, and a sheer pin passes through a protruding end portion of the intermediate shaft,
The combine according to claim 1, wherein the top cover covers a protruding end of the intermediate shaft, an upper end of the bossed drive wheel, and the shear pin .

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